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Who will answer our calls when there is an issue with the software performance? How vast is the software vendor's client base? How does Individual Software performs testing and validation? Business PlanMaker Professional 12 Categories. Business PlanMaker Professional 12 - 10 Alternatives. iPlanner is an essay, online business plan software designed to help entrepreneurs develop business plans easily. Users can present and essay deadline 2015, organize their th. The possible alternatives for online courses considering with Aha! include KiSSFLOW, Viima, Crowdicity, Idea Drop, Fast React Systems, ManageEngine AssetExplorer and. The possible alternatives for ib tok submission Bizplan that the users can consider are OnePlace, PlanGuru, Fundingroadmap, RapidInfluence, Milestone Planner, Regressio. Workfront, JIRA Software, eFront, Optial, Turnkey Lender, CAPIX, PlanGuru, LivePlan, Gatekeeper and Business Plan Pro Premier are some examples of the. BizPlan.com and and continuity essay russia, BizPlan Builder are the competitors of Business Plan Pro.
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Let’s assume that at rubric this point, the entire management team agreed that you are ready to invest on a certain software application. The budget has been compromised and ib tok, the key persons who will be involved in the acquisition process were already identified. Therefore, it’s time to approach things the project management way. Every business software solution is categorized base on application type, features, deployment model, market size and pricing model. Remember that our objective here is to evaluate and buy a business software product that will fit into verification engine-eve2 the size and ib tok submission deadline 2015, present needs of your business. So what the project management team should try to george orwell goodreads, deal with first is to define the real requirements of your business exactly base on the categories set by ib tok essay deadline the software industry. Essays Goodreads. Moreover, by doing this activity, you are already narrowing down your search for ib tok essay submission deadline 2015 the right solution. Now, consider bringing this list of FAQs to the project management and essay verification, aim to come up with clear-cut answers.
What type of software is needed? Is it Integrated-Suite, Best-of-Breed or Industry-Specific? Ask your CEO’s main agenda and find the submission perfect match from these available options. What are the core and secondary features? Are you looking for basic, advanced or hi-end features? List down the essay verification engine-eve2 specific features per category and allow the department managers and supervisors to give their insights on this list. How are you going to deploy the system? Would it be on-premise, cloud-based, hosted, or mobile-based? Weigh these options with the help of your CIO. Are you going for Tier 1, Tier 2 or Tier 3 vendors? Their offered solutions are base on the size of ib tok submission 2015 their target market - SMEs, MNEs or start-ups.
Seek your CFO’s advice as it is important to match your financial capacity against the cost of the solution that the providers have for you. Are you willing to pay for the perpetuity software license or a subscription-based solution is way better? How many users are there and what would be their roles in using the system? Solicit feedbacks from future end users for they know better what challenges and risks might possibly come along their way when they’re using the system. Finalize the BOM or List of Requirements. After providing definite answers on the above questions, we can say that the project has already been defined. Your procurement team is now ready to do their role in the acquisition process of this solution. However, in essay verification engine-eve2, order for them to execute their job properly, they must have the complete list of requirements - features, specifications, hardware, and ib tok deadline, the software product.
In other words, the Bill-of-Materials (BOM) that is essay final, complete and well-prepared must be handed over to the procurement director. Needless to say, it is very important that everybody is following the company purchasing and procurement protocols at all times. Essay Submission 2015. The RFP process will bring everything into formality. Biography Rubric. Since you’re more likely in essay submission deadline 2015, a line of essay rubric business that doesn’t regularly buy software products, it is of critical importance that your RFP is well-structured before you send it to deadline 2015, your prospect solution providers. An RFP that contains all the relevant information as discussed during the project management meetings will enable the providers to return back to you their proposal that is complete and substantial. Therefore, your RFP should basically contain the following: Company Name Mission and Goals Purpose of the essay RFP (or the need for software solution) Business Background. Organizational Structure Current Situation (IT infrastructure, system currently in-use, system issues and ib tok essay 2015, desired solutions, etc.) Major Objectives of the Software Purchase Request for Specific Requirements. Solution Functionality System Specifications Vendor Company Information Price Model, Service Plans, Package Options Other Important Inquiries (if necessary) Well-structured RFP will bring a lot of online courses essay advantages especially when the ib tok submission 2015 proposals from various providers are received and then subjected for review and analysis.
Send your RFP to at least three to essays goodreads, five providers (or prospects which you have already shortlisted during the essay deadline 2015 project definition phase). Depending on the complexity of the solution, most vendors will send their proposal in a matter of time, which could be around 4 to 6 weeks for Integrated-Suite solution. Is there really a need for RFP if your preferred solution (like cloud-based) and the service plans or packages are already displayed on biography rubric the vendor’s website? Well, yes, you still need to undergo the RFP process. For most sales people, they certainly know that those figures appearing in the vendor’s website are usually the “list price” and deadline, not the education “actual price”. More importantly, the ib tok submission deadline 2015 vendor’s proposal (response to RFP) will serve as your main basis for orwell goodreads the negotiation. Ib Tok Essay Submission. Therefore, sending an essay, RFP is a strict requirement. More often than not, questions and concerns will be raised by the vendors to essay submission deadline, whom you send the RFP. You have to entertain them with utmost professionalism. Solution providers who are seeking further clarifications relevant to the RFP are consisting of professional software experts who wants to help your organization as much as they can.
Entertain them but at the same time, always be cautious when providing additional information which you know is online essay confidential or proprietary. Always refer to essay submission, your finalized BOM when tabulating the contents of each proposal. Part of change and continuity essay russia this process is to check the features that are available from this certain vendor and to essay submission deadline 2015, cross out those that are not. While using spreadsheet aids the tabulation process, laying down the essay rubric document proposals on the table and allowing your project management team to review them one by one should always be conducted. Evaluating the deadline 2015 proposals in full force can help strengthen your decision-making process. Have another round of brain-storming session and not to talk in class, come with the name of your preferred solution provider. Which vendor can provide the deadline long-term benefits to your organization?
Which vendor can provide the 500 word not to best and honest service from acquisition to full implementation? Which vendor is essay willing to devote most of its time in better serving its client? Contact this solution provider and in your own strategic approach, try to essays, get the answers to ib tok deadline 2015, those three important questions above. In most cases, vendor who really wants to prove its craft will offer product demos on a higher level. Others will even invite you to check their already deployed and working systems. Feel free to connect with this type of vendor. Conduct simulation and testing, be it a cloud-based or on-premise solution. Examine all aspects and angles especially those that your project management team want to online, really know in-depth. For as long as it could help you arrive at essay a better decision, consider doing all the options available for the interest of the organization. Change Russia. Most solutions providers can be flexible in terms of pricing.
Although the final say is oftentimes on the mouth of the sales person from the vendor’s side, a good negotiation process can always deliver a win-win situation to ib tok essay submission deadline 2015, both parties involve. While negotiation sometimes cannot be settled in one sitting session, always be honest with your intentions whenever negotiating with your provider. If it’s about your budget, justify it with clarity. If it’s about change and continuity their service plans, tell them what’s lacking or missing on their solution. At the end of the day, the ib tok essay deadline most important event that should happen is essay that both of you are shaking hands because of a well done negotiation process. Submission. So what are you going to do on verification a contract that involves a significant amount of investment? There are three project management approaches for submission this. For Special Education Students. Pass the ball to ib tok essay submission, you legal team. They know what to do and more or less they will tell you if there is something wrong with the contract. Give them enough time to review before they affix their signature and then finally seal the contract.
Hire a consultant base on the technical aspect that you want to essay, clarify in the contract. Ib Tok Essay Submission Deadline 2015. If it’s the Scope of 500 word in class Work (SOW), a software implementation expert is the right person. If it is related to complex legal terms and conditions, a lawyer can help. If it has something to ib tok deadline, do with money, invite an accountant to goodreads, conduct a thorough review and computation if necessary. Ib Tok Essay 2015. Always consider consulting your project management team. Online Courses. Remember that the CIO, CFO and CEO are all team members.
They will be the signatories and ib tok essay submission, they know what’s best for the interest of the company when signing a contract agreement. From evaluation to biography essay rubric, buying stage, it is important that the project manager must take full responsibility of monitoring all the works identified and distributed among team members. This is why delegating the right project manager is also an important consideration when buying a business software solution. And again, ITQlick.com wants to emphasize that whatever the size of your company is, using the project management approach will always lead you into a better outcome that is getting what you paid for the right business software solution. Ib Tok Deadline 2015. Proper business software selections are the change and continuity precursor to successful deployment and business growth. Finding the right solutions doesn’t have to be complicated, and it doesn’t have to take days or weeks of your time. Ib Tok Essay Submission. Business PlanMaker Professional 12 8 Alternatives. Business Plan Pro Premier. WebSphere Business Modeler.
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resume pfliederer ru WO 2004104095 A1. BLOCK COPOLYMER COMPOSITION AND TRANSPARENT ELASTOMERIC ARTICLES PRODUCED THEREFROM. CROSS REFERENCE STATEMENT This application claims the benefit of U.S. Provisional Application No. 60/470,461, filed May 14, 2003. The present invention relates to compositions of monovinylidene aromatic- conjugated diene block copolymers.
BACKGROUND Elastomeric articles produced from thermoplastic elastomers such as block copolymers are well known. Thermoplastic elastomers, such as copolymers having blocks of monovinylidene aromatic monomer and conjugated diene monomer are often blended with other thermoplastic polymers, for example, polypropylene, polystyrene, polyethylene, or ethylene vinyl acetate copolymers, to improve processing. These thermoplastic polymers tend to reduce the viscosity of the elastomers and provide improved processability by reducing the elastic nature of the composition, as described in U.S. Patents 4,329,309; 4,173,612; 4,305,990; 4,977,014; and 6,410,129 B2, the teachings of which are incorporated herein by submission 2015, reference. Typically, the elastomeric block copolymer is change and continuity compounded with a thermoplastic polymer and fed to ib tok submission an extruder to essay on why not to talk produce film, fiber or netting materials. However, this process is expensive due to the amount of scrap material generated, and the potential of low quality or non-homogeneity of the essay submission deadline, product.
Further, it is also known in the art that blends of elastomeric block copolymer and thermoplastic polymers can be directly fed to converting extruders to produce useful articles. However, this process requires feeding systems to essay engine-eve2 accommodate multiple components, and the potential for low quality or non-homogeneity of the converted article remains. An additional disadvantage of the ib tok essay submission deadline 2015, compositions discussed above includes the production of opaque or hazy products (that is, low transparency) due to significant differences in the refractive indices of the polymers. Therefore, what is needed is george orwell a transparent block copolymer or blend composition that can be converted into a useful transparent elastomeric article. Further, what is needed is a blended product of an elastomeric block copolymer and a thermoplastic block copolymer that can be produced in essay submission deadline, the same polymerization process, blended while in biography rubric, solution and ib tok, produced as a single pellet product, eliminating the need for compounding or direct feed of multiple components to an extruder.
The present invention is an elastomeric polymer blend composition comprising: A) from 65 to 92 parts by weight of at least one monovinylidene aromatic-conjugated diene block copolymer, hereafter referred to as elastomeric block copolymer, having a monovinylidene aromatic content of less than 50 weight percent, based on essay writing education students the total weight of the elastomeric block copolymer and ib tok essay submission 2015, a weight average molecular weight (Mw) of from 50,000 to 400,000; B) from 8 to 35 parts by weight of at least one monovinylidene aromatic-conjugated diene copolymer, hereafter referred to as thermoplastic block copolymer, having a monovinylidene aromatic content of 50 weight percent or more, based on the total weight of the thermoplastic block copolymer and a weight average molecular weight of from 50,000 to 300,000; and C) from 0 to 30 parts by weight of an extender oil, based on online courses essay the total weight of A, B and C. The elastomeric polymer blend composition may be used in the production of, for example, a monolayer film, as the major component in a coextruded structure such as a multilayer film, an injection molded part, an extruded profile such as tubing, a monolayer or multi-component fiber, and/or a non-woven article. The elastomeric articles exhibit outstanding elastic and stress relaxation properties. Submission 2015? DETAILED DESCRIPTION. Unless otherwise stated, each number range, such as from 8 to 35 parts by weight, includes both endpoints of the range. Courses Essay? The present invention relates to a low stress relaxation transparent elastomeric polymer blend comprising at least one elastomeric block copolymer and at least one thermoplastic block copolymer. Each elastomeric block copolymer comprises an elastomeric soft block portion and at least two thermoplastic hard block portions. Each thermoplastic block copolymer comprises at least one elastomeric soft block portion and at least one thermoplastic hard block portion. As used herein, the term stress relaxation refers to ib tok essay deadline 2015 the percentage loss of tension or load between the maximum load or force encountered after elongating an verification engine-eve2, elastomeric material at a specific rate of extension to ib tok essay deadline 2015 a predetermined length (or the load or force measured at some initial length) and the remaining load or force measured after the sample has been held at that length or elongation for a specified period of time. Relaxation is online courses essay expressed as percentage loss of the initial load encountered at a specific extension of an elastomeric material.
As used herein, the essay 2015, terms transparency or highly transparent refers to a greater than 75 percent (%) value for total transmission. Haze and total transmission (that is, transparency) are measured using the HunterLab Colorquest XE spectrophotometer which uses d/0° (sphere) geometry for transmission measurements. While this haze measurement does not conform to ASTM method D 1003, Standard Test Method for Haze and Luminous Transmittance of Transparent Plastics, due to change essay russia differences in instrument geometry, values obtained for certified standards are similar. Haze is equal to ib tok submission 2015 the percent of diffuse transmittance relative to the total transmittance of the incident light, where diffuse transmittance is essay writing education measured from the light forward scattered at angles greater than 2.5°. As used herein, the terms elastic or elastomeric refer to any material which is capable of being elongated or deformed under an externally applied force, and which will substantially resume its original dimension or shape, sustaining only small permanent set (typically no more than about 20 percent), after the external force is ib tok submission deadline released. The term elastomer refers to change essay russia any material exhibiting elastic properties. As used herein, the term elastomeric block copolymer refers to a block copolymer that contains less than 50 weight percent (wt%) and more preferably less than 35 wt% monovinylidene aromatic monomer in the block copolymer, based on the total weight of the essay submission 2015, block copolymer. Essay? As used herein, the term thermoplastic block copolymer refers to submission deadline a block copolymer that contains 50 wt% or more, and essay on why in class, more preferably 65 wt% or more, of a monovinylidene aromatic monomer in the block copolymer, based on the total weight of the block copolymer. The elastomeric and thermoplastic block copolymers are produced from submission 2015 monovinylidene aromatic monomers and conjugated diene monomers. Monovinylidene aromatic monomers suitable for use in preparing the online courses essay, block copolymers include, but are not limited to, monovinylidene aromatic monomers described in essay deadline, U.S. Patents 4,666,987, 4,572,819 and 4,585,825, and 5,721,320 which are incorporated by reference herein.
Preferably, the monovinylidene aromatic monomers are selected from styrene, alpha- methylstyrene, vinyltoluenes, and vinylpyridines. Conjugated diene monomers include, but are not limited to essay russia 1,3-butadiene, isoprene, chloroprene, and 1,3-pentadiene. Preferred monomers are styrene, 1,3-butadiene and isoprene. In a preferred embodiment, the block copolymers are styrenic block copolymers or styrene-diene block copolymers, such as styrene-butadiene (SB), styrene-butadiene-styrene (SBS), styrene-isoprene (SI), styrene-isoprene-styrene (SIS), SISIS, and SBSBS. Alternatively, the ib tok essay submission deadline 2015, monovinylidene aromatic blocks may be different such as in a styrene- diene-alphamethylstyrene block copolymer, or the diene blocks may be different such as in a styrene-isoprene-styrene-butadiene-styrene (SISBS) block copolymer. The block copolymers may be linear or branched, having from on why not to talk in class 2 to 7 blocks.
However, the block copolymers are preferably linear triblock copolymers, such as SBS and SIS. Submission 2015? Most preferably, both the elastomeric and thermoplastic block copolymers are SIS block copolymers. The block copolymers may also be tapered, wherein there is a gradual compositional transition from one block to another rather than an abrupt change, as is well known in the art. The elastomeric block copolymer used in the polymer blend composition of the present invention typically corresponds to one of the following formulas: A-B-R(-B-A) n Formula I or A-(BA-) X -BA Formula ? wherein: each A is independently, that is, each A may be the same or different, a polymer block comprising a monovinylidene aromatic monomer and and continuity russia, each B is independently, that is, each B may be the same or different, a polymer block comprising a conjugated diene and optionally a monovinylidene aromatic monomer, R is the remnant of submission deadline a multifunctional coupling agent, n is an integer from 1 to biography 5, and deadline 2015, x is a real number from 0 to verification engine-eve2 4. In Formula I, n is preferably 1 to 3 and more preferably 1. In Formula ?, x is preferably an integer of from 0 to 2, and more preferably 0. At least 50 wt% or more of the elastomeric block copolymer is conjugated diene, based on the total weight of the elastomeric block copolymer. Ib Tok? The conjugated diene may comprise a single conjugated diene or mixture of not to talk more than one conjugated diene such as a mixture of isoprene and butadiene.
The monovinylidene aromatic block of the elastomeric block copolymer is ib tok submission less than 50 wt% and is typically from 8, preferably from 10, more preferably from 12, and most preferably from 15 wt% to less than 50, preferably less than () 45, more preferably 40 and most preferably 35 wt%, based on biography essay the total weight of the elastomeric block copolymer. The elastomeric block copolymer typically has a Mw in essay, the range of 50,000 to 400,000 Daltons. As used herein, all Mw's are expressed in Daltons, which is equivalent to grams/mole (g/mol). In linear elastomeric block copolymers, each monovinylidene aromatic monomer block preferably has a peak Mw of at least ( ) 9,000, more preferably 9,500 and most preferably 10,000. Preferably, each monovinylidene aromatic monomer block has a peak Mw of 62,000 or less (), more preferably 53,000, and most preferably 44,000. Each block may have its' own individual Mw. In other words, each monovinylidene aromatic monomer block within the orwell essays goodreads, elastomeric block copolymer does not necessarily have to be the same Mw. Copolymers where the monovinylidene aromatic monomer blocks are not the same Mw are typically referred to as asymmetrical. Preferably, each conjugated diene block has a peak Mw of 40,000, more preferably 50,000 and most preferably 60,000 to 200,000, more preferably to ib tok essay submission 2015 175,000, and most preferably to essay engine-eve2 150,000.
In one embodiment, the elastomeric block copolymer is in radial form, as represented by Formula I, and each monovinylidene aromatic block has a peak Mw of. 9,000, more preferably 9,500, and most preferably 10,000 to 32,000, more preferably to 27,000 and submission 2015, most preferably to 22,000. Preferably, each conjugated diene block has a peak Mw of 31 ,000, more preferably 38,000 and most preferably 41 ,000 to essay writing for special students 86,000, more preferably to 84,000 and most preferably to 81,000. Preferably, the radial elastomeric block copolymer has a peak Mw of 135,000, more preferably 140,000 and even more preferably 145,000 to 400,000, more preferably to 375,000 and 2015, even more preferably to 350,000. In one embodiment, the elastomeric block copolymer has a refractive index in goodreads, the' range from 1.5240 to 1.5526, preferably from 1.5256 to 1.5492, more preferably in the range from 1.5269 to 1.5458, and essay deadline, most preferably from 1.5289 to 1.5424. Refractive index is measured using pressed films less than 0.020 inches (0.05 cm) thick using an Abbe-type refractometer at 25° C according to ASTM Standard D-542. The thermoplastic block copolymer useful in the polymer blend composition of the present invention typically correspond to Formulas I and essay on why not to in class, II as stated previously. In addition, the thermoplastic block copolymer can correspond to ib tok essay deadline Formula HI: B y -(AB-) Z -AB Formula HI wherein A and B are as defined previously, y is 0 or 1 , and z is a real number from 0 to 4. George Orwell? However, less than 50 wt% of the thermoplastic block copolymer is a conjugated diene, based on the total weight of the thermoplastic block copolymer.
The conjugated diene may comprise a single conjugated diene or mixture of conjugated dienes such as a mixture of isoprene and ib tok submission 2015, butadiene. The monovinylidene aromatic block of the thermoplastic block copolymer is 50 wt%, more preferably 60, and most preferably 65 wt% to 95, more preferably to courses essay 90, and most preferably to 85 wt%, based on the total weight of the thermoplastic block copolymer. The thermoplastic block copolymer typically has a Mw in ib tok essay deadline 2015, the range of 50,000 Daltons to 300,000 Daltons. In linear thermoplastic block copolymers, each monovinylidene aromatic monomer block of the thermoplastic block copolymer has a peak Mw that is desirably 12,500, preferably? 14,000, more preferably 16,250 and most preferably 18,750. Each monovinylidene aromatic monomer block has a peak Mw that is desirably 250,000, preferably 225,000, more preferably 200,000 and most preferably 175,000. If the thermoplastic block copolymer comprises more than one monovinylidene aromatic monomer block, then each block may have its' own individual Mw. Each conjugated diene block of change and continuity russia a linear thermoplastic block copolymer has a peak Mw that is preferably 5,000, more preferably? 10,000 and most preferably 15,000 to 125,000, more preferably to 120,000, and most preferably to 115,000.
In one embodiment, diblock structures as derived in Formula IE are useful thermoplastic block copolymers. In this case, each conjugated diene block has a peak Mw of essay 2015 ? 2,500, more preferably ? 7,000 and most preferably 12,000 to 150,000, more preferably to 100,000, and most preferably to 50,000. In another embodiment, the thermoplastic block copolymer is in courses, radial form, corresponding to submission deadline Formula I. In this embodiment, each monovinylidene aromatic block has a peak Mw that is preferably 7,400, more preferably 8,800, and most preferably 11 ,700 to russia 83,800, more preferably to 80,000, and most preferably to 78,000. Each conjugated diene block of a radial thermoplastic block copolymer has a peak Mw that is preferably 700 or more, more preferably 2,000 and most preferably 3,000 to 45,000, more preferably to. 40,000, and most preferably to 155,000. The radial thermoplastic block copolymer has a peak Mw that is preferably 50,000, more preferably 70,000 and essay submission deadline, even more preferably 80,000 to 300,000, more preferably to essay 280,000, and even more preferably to 260,000. In one embodiment, the thermoplastic block copolymer has a refractive index that ranges from 1.5526 to 1.5925, preferably from 1.5624 to 1.5882, more preferably from. 1.5667 to submission deadline 2015 1.5839, and most preferably from 1.5753 to writing 1.5796. Other related copolymers and methods of producing the same are disclosed in deadline 2015, U.S.
Patent Nos. 4,086,298, 4,167,545, 4,335,221, 4,418,180, 4,180,530, 4,221,884, 4,346,198, 4,248,980, 4,248,981, 4,248,982, 4,248,983, and 4,248,984, the biography, disclosures of which are hereby incorporated by essay deadline, reference. The elastomeric and and continuity russia, thermoplastic block copolymers can be prepared by ib tok deadline 2015, anionic polymerization. 500 Word Essay On Why Not To? For purposes of the present specification, the phrase living polymer refers to a polymer being produced as it exists during an anionic polymerization process. Examples of sequential polymerization processes that result in living block polymers after completion of polymerization are known in the prior art and submission deadline, include US 5,242,984 and US.
5,750,623 the russia, teachings of which are incorporated herein by ib tok deadline, reference; and in Holden et. al., Thermoplastic Elastomers, 2nd Edition; pages 51-53, 1996. On Why Not To Talk In Class? Alkali metal hydrocarbon initiators suitable for anionic polymerization are well known in ib tok submission deadline, the art and such initiators include, but are not limited to, lithium alkyls, sodium alkyls, and potassium alkyls. Preferred initiators are lithium alkyls, such as sec-butyllithium and n-butyllithium. Solvents or diluents suitable for the anionic polymerization are also well known in the art.
Examples included aromatic hydrocarbons, saturated aliphatic hydrocarbons, saturated cycloaliphatic hydrocarbons, linear ethers and cyclic ethers, and mixtures thereof. Preferred solvents or diluents are cyclohexane, n-hexane, and isopentane, and mixtures thereof. The polymer blend of the verification, present invention typically comprises from 65 wt%, preferably from 70 wt%, more preferably from 72 wt%, and ib tok essay submission deadline 2015, most preferably from 75 to 92 wt%, preferably to 90 wt%, more preferably to 85 wt% and most preferably to 80 wt% of elastomeric block copolymer A, based on the total weight of A, B and C, each of which is defined herein. The amount of thermoplastic block copolymer B used in the polymer blend composition of the orwell, present invention depends upon the article produced and ib tok essay deadline, the method of producing the article. One skilled in the art would recognize the necessary properties that the composition of the invention must have to allow the composition to be processed by the chosen method. For example, films may be cast wherein as little as 8 parts by online courses essay, weight (pbw) of thermoplastic block copolymer is used, whereas, at least 15 pbw of the essay submission deadline 2015, thermoplastic block copolymer is preferably used to prepare films by extrusion blowing methods or in the production of fibers and non- oven structures. In injection molded and profile extruded applications, the composition would likely be at least 15 pbw and change and continuity essay russia, up to 35 pbw of thermoplastic block copolymer, based on the combined weights of A, B and C.
The polymer blend of the present invention typically comprises from 8 wt%, preferably from 10 wt%, more preferably from 12 wt%, and most preferably from 14 wt% to submission 35 wt%, preferably to 32 wt%, more preferably to 30 wt% and most preferably to 25 wt% of the thermoplastic block copolymer B, based on the total weight of A, B and C. If a blend of elastomeric block copolymers, such as a SIS block copolymer and a SBS block copolymer is desired, the change and continuity essay, SIS block copolymer is preferably present in an amount of 50 wt%, more preferably 60 wt% and most preferably 70 wt%, based on the total weight of the elastomeric block copolymers. Submission 2015? Blends of elastomeric copolymers comprising high levels of isoprene-containing block copolymers show fewer tendencies to form gels in extrusion processes versus elastomeric block copolymers containing butadiene blocks. Preferably, the polymer blend composition of the present invention has a melt flow rate or MFR (grams/10 minutes (g/10 min), 200°C, 5 kg, 2.0955 mm diameter hole; ASTM D-1238, former Condition G) of greater than or equal to 1, more preferably greater than or equal to 2, and most preferably greater than or equal to 3, and less than 100, preferably less than 80 and most preferably less than 60. The elastomeric linear block copolymers used in the polymer blend of the present invention preferably contain little or no diblock copolymers. Diblock copolymers are polymers that contain only one monovinylidene aromatic monomer block and one conjugated diene block. The presence of essay significant amounts of diblock in a linear elastomeric block copolymer results in inferior properties in elastomeric articles prepared from such a block copolymer relative to the same properties of elastomeric articles prepared from compositions of the invention, for example, lower stress retention. Preferably, any diblock copolymers are present in linear block copolymers at an amount of 5 wt%, more preferably 2 wt%, based on the total weight of the elastomeric block copolymer. The presence of diblock copolymers can be prevented by utilizing a sequential polymerization process. Such sequential polymerization processes are well known in the art and preferred for submission 2015 the preparation of the block copolymers used in this invention, as disclosed in U.S.
Patents 5,242,984 and 5,134,968, both of which are incorporated herein by reference. If elastomeric radial block copolymers, which are typically produced via a coupling process, are used in the polymer blend compositions of the present invention, larger amounts of diblock copolymers can be tolerated. Preferably, the diblock copolymers are present in radial block copolymers at an amount of 15 wt%, more preferably 10 wt%, and most preferably 6 wt%, based on the total weight of the radial block copolymer. In addition to the elastomeric block copolymer A and the thermoplastic block copolymer B, the essay, polymer blend of the present invention can also comprise other additives commonly used in polymer compositions such as extenders, slip agents, pigments, anti- oxidants, heat stabilizers, photostabilizers and the like. In a preferred embodiment, the blend of the present invention does not contain any significant amount of additional polymers besides the elastomeric and thermoplastic copolymers.
A significant amount refers to amounts which would substantially alter the ib tok essay submission deadline 2015, physical properties of the blend and is typically greater than 5 wt%, based on change essay russia the total weight of A, B and C. Specifically, the essay deadline, polymer blend composition of the george essays goodreads, present invention optionally contains an extender oil C, which comprises hydrocarbon oils, polymers or oligomers derived from monomers having olefinic unsaturation compatible with the ib tok submission deadline, conjugated diene block, or mixtures thereof. Extenders include aliphatic hydrocarbon oils or naphthenic oils, or mixtures thereof, with aliphatic hydrocarbon oils such as white mineral oil being most preferred. The extender or oil, if used, is typically present in an amount of from 1 wt%, preferably from 2 wt%, more preferably from 3 wt% and most preferably from 4 wt% to 30 wt%, more preferably to 25 wt%, and most preferably to george goodreads 20 wt%, based on the total weight of A, B, and C. Ib Tok Deadline? The polymer blend composition of the present invention may further include slip agents, as disclosed in U.S. Patent 4,476,180, which is incorporated herein by reference. Examples of such agents are those commonly derived from amides of fatty acids having from 12 to for special students 22 carbon atoms. Such slip agents are commonly incorporated in compositions in amounts of from 0.05 pbw to 5 pbw of the submission, polymer blend composition. Such slip agents should be used at minimal levels so as not to writing for special impart opacity or increases in haze or reduction in transparency to the blend. Heat stabilizers and essay submission 2015, antioxidants include TRGANOX ® 1010 tetrakis(methylene (3,5- di-tert-butyl-4-hydroxyhydrocinnamate)) methane, TRGANOX ® 1076 octadecyl 3,5-di-tert- butyl-4-hydrohydroxycinnamate and TRGANOX ® 565 4-((4,6-bis(octylthio)-s-triazin-2- yl)amino)-2,6-di-tert-butylphenol. For Special Education Students? Secondary antioxidants may also be used with primary antioxidants, for essay submission deadline example aromatic phosphite compounds such as tris-nonyl-phenol phosphite.
Heat stabilizers and antioxidants are incorporated in the compositions of the invention at a level of from essay 0.05 pbw to 1.5 pbw, based on the total weight of the essay deadline 2015, polymer blend composition. Such antioxidants should not impart opacity or increases in haze or reduction in russia, transparency to essay 2015 the blend. Examples of writing for special education students preferred photostabilizers include derivatives of ib tok essay submission benzophenone. Such photostabilizers are generally incorporated in the polymer blend composition at george orwell a level from essay 0.1 pbw to 3 pbw of the polymer blend composition. Such photostabilizers should not impart opacity, increase haze or reduce transparency of the on why not to talk, blend. In some applications, pigments may be desired to color the transparent blend or impart a level of opaqueness. Pigments are typically added to the polymer blend composition in the form of concentrates, at levels of from 0.5 pbw to 5 pbw, based on the total weight of the polymer blend composition. Submission Deadline 2015? Polymers used as concentrate carriers should have similar refractive indices to the refractive index of the polymer blend.
Any combination of the optional constituents described herein above maybe used in the polymer blend composition of the present invention. The copolymers utilized in the polymer blend of the present invention can be produced by a traditional anionic polymerization process, using existing aliphatic solvents and process equipment. The copolymers can be blended together in talk, a vessel, optionally with an extender oil; extruded and devolatilized to produce a single pellet product, for conversion into, for ib tok 2015 example, films, fibers, non-woven products and injection molded articles. The elastomeric and thermoplastic block copolymers can be made separately, in different reactors or can be prepared simultaneously within the same reactor. In one embodiment, the present invention is related to a process of producing a blend of a thermoplastic copolymer and an elastomeric copolymer, comprising: -polymerizing a monovinylidene aromatic monomer and a diene monomer to produce an elastomeric block copolymer polymerization mixture comprising a block copolymer of essay writing education students less than 50 wt% monovinylidene aromatic monomer, based on the total weight of the block copolymer; -polymerizing a monovinylidene aromatic monomer and a diene monomer to produce a thermoplastic block copolymer polymerization mixture comprising a block copolymer of at least 50 wt% monovinylidene aromatic monomer, based on the total weight of the block copolymer; -contacting the elastomeric copolymer polymerization mixture with the thermoplastic copolymer polymerization mixture to ib tok deadline form a blended polymerization mixture; -devolatilizing the change and continuity essay russia, blended polymerization mixture to form a blended polymer product, and -pelletizing the blended polymer product. In one embodiment, the elastomeric and thermoplastic block copolymers are produced simultaneously in an anionic reaction process, with the optional addition of an extender oil prior to extrusion into pellets. Additional components such as slip agents, stabilizers, pigments, and the like, can be added to the blending process prior to pelletization or added to the extrusion process via separate feeding system as is typically done in the industry.
Antiblock agents can also be added to the extruded pellets. This produces a finished product that does not require further compounding or mastication prior to extrusion into a converted article such as film, fibers, non- woven articles and injection molded articles. If the elastomeric and thermoplastic copolymers are produced separately via anionic polymerization, the final composition of the invention and optional additives, such as the extender oil, can be prepared by contacting the ib tok essay submission, ingredients in an appropriate mixing device such as an george, extruder, twin-screw extruder or a high efficiency mixer typically used for thermoplastics or thermoplastic elastomers. However, it is preferred to blend the components prior to extrusion or further processing. Furthermore, if the elastomeric and ib tok deadline, thermoplastic copolymers are produced separately, the mixing can be performed in the process of forming an article, for instance, in a blown or cast film process, an injection molding process, or a fiber spinning process with multiple feed systems and essay, the appropriate mixing screw and extruder design. The polymer blend composition of the present invention produces articles having the ib tok essay, following properties and advantages: a tensile strength greater than 10.0 megapascals (MPa); a peak force at 200 percent elongation of greater than 0.7 MPa a set of 15 percent (%) or less; a stress relaxation of 20% or less; a % haze of less than 50%; and a % transparency of greater than 75%. As used herein, the essay rubric, term tensile strength or tensile stress is defined by the following equation: Tensile stress MPa = F / A where F = observed force at specified elongation A = cross-sectional area of ib tok essay submission deadline 2015 unstretched specimen. As used herein, the term elongation is defined by online courses essay, the following equation: Elongation (%) = 100(L— L 0 )/Lo where L = observed distance between the bench marks on stretched specimen in cm Lo = original distance between the bench marks in cm. As used herein, the terms set or percent set refer to the percent deformation of an elastomeric material measured while the material is in deadline, a relaxed condition for a specified period of time (that is, 60 seconds for and continuity essay the Test Methods described herein) after the material is released from ib tok submission deadline 2015 a specified elongation without allowing the material to snap back completely.
The percent set is expressed as [(zero load extension after one cycle-initial sample gauge length of cycle l)/(initial sample gauge length of 500 word essay in class cycle l)] ? l00. Zero load extension refers to the distance between the jaws at the beginning of the second cycle before the tensile testing equipment registers a load. As used herein, the term high haze refers to a greater than 50 % value for haze and ib tok deadline, the terms transparency or highly transparent refers to a greater than 75 % value for for special total transmission. Haze and total transmission (that is, transparency) are measured using the essay submission 2015, HunterLab Colorquest XE spectrophotometer which uses d/0° (sphere) geometry for change and continuity transmission measurements. While this haze measurements does not conform to ASTM method D 1003, Standard Test Method for Haze and ib tok essay submission 2015, Luminous Transmittance of Transparent Plastics, due to essay differences in instrument geometry, values obtained for certified standards are similar. Haze is equal to the percent of diffuse transmittance relative to the total transmittance of the incident light, where diffuse transmittance is measured from the light forward scattered at submission 2015 angles greater than 2.5°.
Haze and total transmission (that is, transparency) was obtained on plaques 0.125 inch (0.318 cm) thick. In one embodiment, the polymer blend composition useful in preparing transparent elastomeric articles, comprises: (A) from george orwell essays 65 to 92 pbw of one or more elastomeric block copolymer(s) corresponding to ib tok 2015 one of the formulas: A-B-R(-B-A) n or A-(BA-) X -BA, wherein each A is a polymer block comprising a monovinylidene aromatic monomer and each B is a polymer block comprising a conjugated diene and optionally a monovinylidene aromatic monomer, R is the remnant of a multifunctional coupling agent, n is an integer from 1 to 5, x is a real number from 0 to 4; at least 50 wt% of the block copolymer is a B block comprised of isoprene or butadiene or combinations thereof; the wt% of monovinylidene aromatic monomer in essay writing for special, the block copolymer is submission deadline less than 50 wt% and is most preferably from 8 to 35 wt%, based on the total weight of the elastomeric block copolymer; the engine-eve2, total block copolymer composition contains no more than 5 wt% of a diblock of the ib tok essay deadline, formula B-A; the block copolymer has a MFR of from 0.1 to 50 g/10 min.; and the elastomeric block copolymer comprises styrene and biography, butadiene; styrene and isoprene; styrene, isoprene and butadiene; or any combination thereof; and. (B) from ib tok submission 2015 8 to 35 pbw of one or more thermoplastic block copolymer(s) corresponding to essay talk one of the formula: A-B-R(-B-A)n or A-(BA-) X — BA or B y -(AB-) Z -AB: wherein each A is a polymer block comprising a monovinylidene aromatic monomer and each B is a polymer block comprising a conjugated diene and optionally a monovinylidene aromatic monomer, R is the remnant of a multifunctional coupling agent, n is an integer from 1 to 5, x is a real number from ib tok submission deadline 2015 0 to 4, y is 0 or 1, and essay, z is a real number from 0 to 4; less than 50 wt% of the block copolymer is a B block comprised of isoprene or butadiene, the weight percent of monovinylidene aromatic monomer in the block copolymer is 50 wt% or more, more preferably 65 to essay submission 2015 95 wt%; the block copolymer has a MFR of from 0.1 to 50 g/10 min.; and the thermoplastic block copolymer comprises styrene and butadiene; styrene and isoprene; or styrene, isoprene and butadiene; and. (C) from verification 0 to 35 pbw of an extender oil, based on the total weight of A, B and C. Ib Tok Submission 2015? Extrusion blown films may be prepared from the writing for special education, polymer blend compositions of the present invention using standard equipment, standard techniques and typical conditions. A die gap of ib tok submission deadline 5 to online courses 120 mils (127 micrometers (?m) to 3048 ?m) is ib tok 2015 acceptable, a gap of 10 to 80 mils (254 ?m to 2032 ?m) is preferred, and a gap of change and continuity russia 20 to 50 mils (508 ?m to 1270 ?m) is most preferred. Melt temperatures of 170°C to ib tok essay deadline 232°C are acceptable and between 175°C and 215°C are preferred. A blow-up ratio of essay for special education students 1 : 1 to 10: 1 is essay submission deadline preferred. Rapid cooling of the extruder blown film is preferably performed by a dual lip cooling ring. Due to the low modulus of the film produced from the composition of engine-eve2 this invention, a roller-collapsing frame is essay deadline 2015 preferred to avoid bubble chatter. A film which is extrusion blown from the polymer blend composition of the present invention is typically between 0.5 and george orwell, 10 mils (12.7 ?m to 254 ?m) in thickness, and is preferably between 1 and 6 mils (25.4 ?m to 152.4 ?m) in ib tok essay submission, thickness and essay on why not to, is most preferably between 1.5 and 4 mils (25.4 ?m to ib tok essay submission 2015 101.6 ?m) in biography essay rubric, thickness. Cast films can be processed at extruder conditions and die gaps similar to extrusion blown films.
Melt temperatures of 170°C to ib tok submission deadline 2015 232°C are acceptable and orwell essays goodreads, between 175°C and 215°C are preferred. Draw down ratios of deadline 2015 1 : 1 to 2: 1 are preferred for monolayer films. Essays? Cast films can be coextruded with the incorporation of one or two skin layers over submission deadline, the elastic core and can be produced at higher draw ratios. As used herein, the term skin layer refers to a layer comprising a thermoplastic polymer or polymeric blend. The skin layer can comprise for 500 word on why not to example polyolefins, such as polyethylene and/or polypropylene, ethylene copolymers such as ethylene vinyl acetate copolymers, polystyrenes, styrene-butadiene copolymers (such as K-RESIN™), styrene-isoprene copolymers, or blends thereof, that are substantially less elastomeric than the elastomeric layer. The skin layer is considered substantially less elastomeric if the permanent set of the skin layer is at least 20 % greater than that of the elastomeric layer. Permanent set refers to the deformation of a material measured in a sufficient time after the material is released from a specified elongation to allow the material to snap back fully. The skin layer should be a transparent material to submission deadline 2015 allow the combined films structure to maintain its transparency. George Orwell Essays? Some melt mixing can occur at the film interfaces and create a film that is less transparent. Those skilled in ib tok essay deadline, the art of coextrusion understand this phenomena.
A preferred skin layer is essay writing education students produced from commercially available film grade styrene-butadiene copolymers offered by Chevron Phillips know as K-RESIN™. Block copolymers of ib tok essay submission deadline 2015 monovinylidene aromatic and diene monomers can also be used as skin layers, wherein the block copolymer comprises from 35 to 95 wt% monovinylidene aromatic based on the total weight of the block copolymer. Monovinylidene aromatic and diene monomers are as described previously in the present specification. (Note: the thermoplastic block copolymers described in the present invention can additionally be used as skin layers in george essays goodreads, multi-layer films). Ib Tok Submission Deadline 2015? This invention relates to a composition useful for preparing transparent elastomeric articles such as films, fibers, non- woven articles, and injection molded parts and extruded profiles. The articles of this invention may be used in a wide variety of applications where transparent elastomeric materials are useful, as well as in elastomeric applications where transparency is not required.
In particular, such articles are useful as low cost elastic members for disposable wearing apparel such as diapers, medical gowns and disposable dresses. In another embodiment, the and continuity russia, invention comprises elastomeric articles comprising the submission 2015, composition of the online courses, invention to produce monolayer elastomeric films, coextruded elastomeric films (that is, containing one or two thermoplastic skin layers such as a three layer film for example: styrene-butadiene copolymer skin — elastomeric composition — styrene-butadiene copolymer skin), co-extruded fibers and spun bond non-wovens articles produced from submission 2015 said fibers. Biography Essay? The composition of the invention prepares elastomeric articles with good elastic properties. For films or compositions produced with a skin layer(s), the film must be tentered or activated prior to use as an elastic article. The addition of the ib tok essay deadline, skin layer makes the elastic article more suitable for conventional film production, in printing operations as well for the production of apertured film. TEST METHODS. A. Tensile Strength And Elongation At Failure. Test specimens are obtained from compression molded samples using an change and continuity russia, ASTM. D1822 Type L die with 1.28 centimeter (cm) tabs.
Films are cut into 2.54 cm strips in the machine direction (MD) of the film by 15.24 cm long in the transverse direction (TD) (the transverse direction which is at deadline 2015 a 90° angle from MD) specimens. The tensile stress-strain properties of the compression molded plaque samples are determined according to ASTM. Method D412-87 and online essay, ASTM Method D882-91 for the film samples. The average result of three samples is reported. B. Hardness Test. Shore A durometer hardness is determined according to ASTM D 2240 using a. Model 716A Durometer Hardness System available from Shore Instruments.
Sample plaques of 3.175 millimeter (mm) thickness were stacked to a thickness of 6.35 mm thickness before testing. C. Melt Flow Rate. Tested in accordance with ASTM D-1238, at conditions 200 degree centigrade (°C)/ 5 kg using a standard die with a 2.0955 mm diameter hole (formerly known as Condition. D. Two Cycle Hysteresis Test Test specimens are obtained from compression molded samples using an ASTM. Dl 822 Type L die with 1.27 cm or from films. Films are cut into 2.54 cm strips in the machine direction (MD) by 10.16 cm long in the transverse direction (TD). The two-cycle hysteresis is measured at room temperature(about 23° C.) with extension to 200 % strain. The hysteresis properties of the samples are based on ASTM Method D4649-87.
E. Optical Properties. Haze and transparency values were determined with a Hunter Lab Tristimulus. Colorimeter Model D25P-9 with glass test standard numbered 425 in essay submission deadline 2015, accordance with. ASTM Method D 1003-92 on essay rubric 3.175 mm thick plaques. F. Ib Tok Essay 2015? Molecular Weight of Polymer When measuring molecular weights, the technique employed is that of and continuity gel permeation chromatography employing a polystyrene standard. Molecular weights for all blocks or polymers except polystyrene based block or polymers, are corrected according to the method disclosed in Runyon et al., J. of Applied Polymer Science 13, 2359 (1969) and Tung, J. of submission deadline 2015 Applied Polymer Science 24, 953 (1979). The following examples are provided to illustrate the present invention. The examples are not intended to limit the scope of the present invention and they should not be so interpreted. Amounts are in weight parts or weight percentages unless otherwise indicated. Elastomeric Block Copolymer Preparation.
BCP-1 (Block Copolymer Preparation- 1 is a method for change and continuity essay russia preparing a styrene linear elastomeric styrene-isoprene-styrene (SIS) block copolymer.) To a 18.5 liter stirred reactor under a nitrogen atmosphere is added 13.68 kilograms. (kg) of hydrocarbon solvent which consists of approximately 90% cyclohexane and essay submission deadline, 10% n-hexane by engine-eve2, weight. For solvent purity, the reactor is ib tok submission deadline blanked by adding 11.5 grams (g) of a cyclohexane solution which is 0.1195 molar in low molecular weight polystyryl lithium. At a temperature of 75.6°C, 93.0 g of a 0.220 molar solution of sec-butyllithium in cyclohexane solvent are added followed by biography essay, 322.9 g of ib tok essay submission deadline styrene. The polymerization is allowed to continue for 69 minutes, and then 1581 g of isoprene are added at 65°C which polymerizes and reaches a peak temperature of 94.2°C. Change Essay? At the end of 14 minutes, the submission deadline 2015, temperature is cooled to rubric 76.9°C, and ib tok essay, then 322.9 g of styrene monomer is added and allowed to polymerize for biography 17 minutes. To quench the reaction, 3.5 milliliters (ml) of isopropanol is added. After removal from the reactor, retained aliquots of solution are neutralized with phosphoric acid at ib tok essay deadline a molar ratio of 0.4 mole acid per mole of courses essay lithium agent added per unit volume of liquor. Submission? Prior to recovery by devolatilization of volatile compounds in a vacuum oven set at 100°C for essay a minimum of 3 hours, phenolic antioxidant is added at a level of 1250 parts per million parts (ppm) of base polymer and phosphite antioxidant is added at a level of 3000 ppm of base polymer. Analysis by size exclusion chromatography shows a single main peak with a number average molecular weight (Mn) of essay deadline 2015 83,000 on a polystyrene calibration basis and a peak maximum at george essays goodreads 108,000 on a polystyrene calibration basis.
This polymer is identified as a elastomeric styrene-isoprene-styrene (SIS) block copolymer, containing 29 wt% styrene. Thermoplastic Block Copolymer Preparation. BCP-2 (Block Copolymer Preparation-2 is a method of essay submission preparing a styrene linear thermoplastic styrene-isoprene-styrene (SIS) block copolymer.) To a 18.9 liter stirred reactor under a nitrogen atmosphere is added 13.95 kg of hydrocarbon solvent consisting of approximately 90% cyclohexane and 10% n-hexane by weight. For solvent purity, the 500 word essay talk in class, reactor is blanked by adding 12.9 g of deadline 2015 a cyclohexane solution which is 0.1195 molar in essay for special students, low molecular weight polystyryl lithium. At a temperature of ib tok submission 82.1 °C, 73.0 g of a 0.220 molar solution of sec-butyllithium in cyclohexane solvent are added followed by 851.6 g of essay talk in class styrene.
The polymerization is allowed to continue for essay submission 25 minutes, and then 567.7 g of isoprene is added at online 72.1°C which polymerizes and reaches a peak temperature of 78.3°C. Essay Deadline 2015? At the end of online essay 11 minutes, the temperature is ib tok deadline 2015 cooled to 71.2°C, and then 851.6 g of styrene monomer is added and allowed to online courses polymerize for 20 minutes. To quench the reaction, 3.5 ml of isopropanol is added. After removal from the reactor, retained aliquots of essay deadline 2015 solution are neutralized with phosphoric acid at a molar ratio of courses 0.4 mole acid per essay 2015, mole of lithium agent added per unit volume of liquor. Prior to not to recovery by devolatilization of volatile compounds in a vacuum oven set at 100°C for a minimum of 3 hours, phenolic antioxidant is essay submission deadline added at a level of online 1000 ppm of base polymer and phosphite antioxidant is added at a level of 1000 ppm of base polymer. Analysis by ib tok submission 2015, size exclusion chromatography shows a single main peak with a Mn of 111,200 on a polystyrene calibration basis and a peak maximum at 122,200 on a polystyrene calibration basis.
This polymer is identified as a thermoplastic styrene-isoprene-styrene (SIS) block copolymer, containing 75 wt% styrene. Engine-eve2? Simultaneous Elastomeric and Thermoplastic Block Copolymer Preparation. BCP-3 (Block Copolymer Preparation-3 is essay submission a method for essay preparing a blend of elastomeric and deadline 2015, thermoplastic block copolymers simultaneously.) To a 18.9 liter stirred reactor under a nitrogen atmosphere is added 13.71 kg of hydrocarbon solvent consisting of biography essay rubric approximately 90% cyclohexane and 10% n-hexane by weight. For solvent purity, the reactor is ib tok blanked by adding 10.5 g of writing education a cyclohexane solution which is 0.117 molar in low molecular weight polystyryl lithium. At a temperature of 76°C, 11.0 g of a 0.220 molar solution of sec-butyl lithium in essay, cyclohexane solvent is verification added followed by 272.7 g of ib tok essay deadline styrene. The polymerization is allowed to continue for essay engine-eve2 41 minutes, and then 44.1 g of a 0.220 molar solution of sec-butyl lithium in cyclohexane solvent is added followed by 186.2 g of styrene. Ib Tok Submission Deadline 2015? The polymerization is allowed to rubric continue for 105 minutes, and then 1551.8 g of isoprene is added at essay 83.3°C.
At the 500 word not to, end of 16 minutes, the temperature is cooled to 71.4°C, and then 189.3 g of essay 2015 styrene monomer is added and allowed to polymerize for 77 minutes. To quench the reaction, 3.5 ml of essay writing for special isopropanol is deadline 2015 added. After removal from the reactor, retained aliquots of solution are neutralized with phosphoric acid at a molar ratio of 0.4 mole acid per mole of lithium agent added per unit volume of liquor. Prior to george essays goodreads recovery by devolatilization of volatile compounds in a vacuum oven set at 100°C for a minimum of 3 hours, phenolic antioxidant is added at a level of 1000 ppm of ib tok essay submission deadline base polymer and phosphite antioxidant is added at a level of 1000 ppm of base polymer. Analysis by size exclusion chromatography shows two peaks, one with a Mn of 135,555 on a polystyrene calibration basis and another peak with a Mn of 189,080 on a polystyrene calibration basis. This polymer is identified as a blend of elastomeric styrene-isoprene-styrene (SIS) and thermoplastic styrene-isoprene-styrene (SIS) block copolymer, containing an online courses, average of submission deadline 2015 31.0 weight percent styrene. The peak with the Mn of 135,555 has a styrene content of 19.4 wt% and the peak with the Mn of 500 word essay not to talk 189,080 has a styrene content of essay deadline 2015 53.1 wt%. EXAMPLES EXAMPLES 1-5. Comparative Example 1 utilizes a high molecular weight thermoplastic homopolymer polystyrene (PS-1) product blended with a linear elastomeric styrene- isoprene-styrene (SIS-1) block copolymer. Comparative Example 2 contains a high molecular weight thermoplastic homopolymer polystyrene (PS-1) product blended with a linear elastomeric styrene- isoprene-styrene (SIS-1) block copolymer and mineral oil.
Comparative Example 3 is online courses essay a blend of a 29 wt% styrene containing elastomeric styrene-isoprene-styrene (SIS-1) block copolymer and mineral oil. Example 4 contains a 75 wt% styrene containing linear thermoplastic styrene- butadiene-styrene-butadiene (PS-2) block copolymer blended with a 29 wt% styrene containing elastomeric styrene-isoprene-styrene (SIS-1) block copolymer and mineral oil. Ib Tok Submission Deadline? Example 5 contains a 75 wt% styrene containing linear thermoplastic styrene- butadiene-styrene-butadiene-styrene (SBSBS) pentablock copolymer (PS-3) blended with a 29 wt% styrene containing elastomeric styrene-isoprene-styrene (SIS-1) block copolymer and essay verification engine-eve2, mineral oil. Process Comparative Example 1 20 g of PS-1 and 80 g of SIS-1 are added to a 0.9472 liter jar and filled with 0.5 liter of cyclohexane. The polymer solution is placed on a shaker for submission deadline 2015 24 hours to verification engine-eve2 allow the polymer to go into solution. The resultant solution is then placed in a devolatilizing oven and the solvent is removed. The resulting polymer blend is then collected and 45 g placed on a pre-heated Farrel 3 x 7 (7.6 cm x 17.8 cm) roll mill (Model 3FF500) at 155°C roll temperature for 90 seconds.
The sheet is removed and used for subsequent testing. Sheets are prepared (approximately 0.94 mm thick) using a pre-heated molding press (PHI Model SB234C-X-MS-X24) at 200°C platen temperature. 7.0 to ib tok essay 2015 7.5 g of the above roll mill specimen is evenly distributed into a 75 mm wide by 115 mm high by 0.94 mm thick chase layered between TFE-coated glass sheet and metal backing plates. The specimen is molded as follows: pre-heat 3.0 minutes at minimal pressure; medium force 0.5 minutes (10,000 kg ram force); material cure 3.0 minutes (20,000 kg ram force); cooling period 4.5 minutes (20,000 kg ram force, ambient temperature water cooling). The specimens are stored at least 24 hours at 23 °C and then die-cut using an for special, ASTM-D 1822 Die L for tensile and hysteresis testing. Initial gauge length is 25.4 mm and ib tok deadline 2015, 3 specimens per compound are tested.
Tensile samples are pulled in the roll mill direction and hysteresis samples are pulled transverse to the roll mill direction. The properties are shown in Table 1. Comparative Example 2-The process of Comparative Example 1 is essay writing repeated using 15 g of. PS-1, 80 g of deadline SIS-1 and 5 g of mineral oil. Comparative Example 3 -The process of essay verification engine-eve2 Comparative Example 1 is repeated using 88.2g of. SIS-1 and 11.8 g of mineral oil. Example 4-The process of Comparative Example 1 is repeated using 15 g of PS-2, 75 g of.
SIS-1 and 10 g of mineral oil. Example 5 -The process of submission Comparative Example 1 is essay on why not to repeated using 15 g of PS-3 -, 75 g of. SIS-1 and 10 g of mineral oil. -PS-1 is a free radically produced general purpose, thermoplastic homopolymer polystyrene (The Dow Chemical Company STYRON™ 68 5 ), with peak Mw 323,800 and MFR of deadline 1.7 g/ 10 rninute (200 ° C). -PS-2 is a 75 wt% styrene, thermoplastic styrene-butadiene-styrene (SBS) block copolymer, with peak Mw 103,000 and MFR of change and continuity essay russia 8.1 g/ 10 minute (200 C C). Essay Submission Deadline 2015? -PS-3 is george orwell essays goodreads a 75 wt.% styrene, thermoplastic styrene-butadiene-styrene-butadiene-styrene (SBSBS) block copolymer, with peak Mw 95,000 and MFR of 7.2 g/ 10 minute (200 ° C). -SIS-1 is a 29 wt% styrene containing, elastomeric styrene-isoprene-styrene (SIS) triblock copolymer known as VECTOR™ 4211 , available from ib tok 2015 Dexco Polymers LP, with peak Mw 96,000 and MFR of 12.0 g/ 10 minute (200 ° C). -The mineral oil (MO) used is biography essay rubric a white mineral oil with 200 centipoise (CPS) viscosity known as Witco 200, available from Witco Chemical Co. For Comparative Examples 1 and 2, containing polystyrene homopolymers, the compositions show good tensile strength, peak force, stress relaxation and set.
However, they show very high haze and a relatively low level of transparency. A virtually opaque elastomeric product is produced. Comparative Example 3 containing the styrene-isoprene-styrene copolymer and ib tok essay submission, mineral oil, shows significantly better optical properties. A highly transparent elastomeric product with low haze is produced. However, experience tells us that this medium (18 to 33 wt%) styrene elastomeric block copolymer with oil cannot be easily extruded into essay verification, an elastomeric article. Successful extrusion requires an elastomeric block copolymer containing more than 33 wt% styrene and more preferably 40 wt% styrene or additions of at least 5 wt%, more preferably 10 wt% and most preferably 15 wt% of a thermoplastic polymer or thermoplastic block copolymer.
Therefore, although it has good overall properties, and submission deadline 2015, specifically low haze and high transparency, it has little commercial value. Example 4 contains PS-2, SIS-1 and mineral oil. George Goodreads? This product shows similar physical, and elastic properties to Comparative Example 2, however, a transparent elastomeric product is produced. Example 5 contains PS-3, SIS-1 and ib tok essay submission, mineral oil. This product shows similar physical, elastic and transparency properties to Example 4.
Example 6-A commercially available thermoplastic styrene-butadiene block copolymer (SBS) product (PS-4 ) is essay blended with an deadline, elastomeric styrene-isoprene-styrene (SIS) block copolymer. The blend contains low levels of change and continuity essay russia slip agent to aid its cast extrusion into a film. It contains no mineral oil. 2830 g of PS-4, 8500 g of essay submission SIS-1, and 28.4 g of writing students slip agent (KEMAMIDE™ E Ultra from Crompton Plastics Additives) is blended in a 500-liter ribbon blender for 30 minutes, then compounded and pelletized on a Werner Pfliederer ZSK-70 twin-screw extruder equipped with a Gala pelletizer (1 atmospheric vent, 24 die holes of 6.35 mm diameter). The extruder is operated at 200 to 300 rpm, 145 to 215°C. Film is cast from pellets using a cast extruder set-up attached to a Davis Standard single-screw extruder with a 48 mm diameter die. Ib Tok 2015? Temperatures are 160-225° centigrade. The film thickness is 0.013 inch (in) or 0.33 mm and is tested in the transverse or cross direction. Essay Verification? The properties are shown in ib tok essay deadline, the Table 2. -PS-4 is an george, anionicalfy produced radial styrene-butadiene copolymer known commercially as K-Resin™ DK-13. The MFR is 10.0 g 10 minute (200 °C). It is prepared according to patents referenced by Chevron Phillips Chemical Co. -SIS-1 is as stated previously.
Example 6 shows that a blend of a thermoplastic styrene-butadiene block copolymer and an elastomeric block copolymer, with no mineral oil, can make a commercially viable transparent elastomeric film product. Example 7-The process of Comparative Example 1 is repeated with 20g of PS-5, 75g of SIS-2 and 5g of mineral oil. Example 8-The process of Comparative Example 1 is ib tok submission deadline 2015 repeated with 15g of essays goodreads PS-6 and 85g of SIS-2. Example 9-The process of Comparative Example 1 is repeated with 15g of PS-7, 70g of SIS-2 and 15g of mineral oil. Example 10-The process of Comparative Example 1 is repeated with 20g of submission deadline PS-8, 70g of SIS-2 and lOg of engine-eve2 mineral oil. Example 11 -The process of essay deadline Comparative Example 1 is repeated with 15 g of change russia PS-9, 75g of SIS-3 and deadline, lOg of mineral oil. -PS-5 is a 75.5 wt% styrene, thermoplastic styrene-isoprene-styrene (SIS) block copolymer.
The peak Mw is 112,000 and the MFR is. 6.5 g/ 10 minute (200 °C). -PS-6 is a 81.4 wt% styrene, thermoplastic styrene-isoprene-styrene (SIS) block copolymer. The peak Mw is 108,000 and the MFR is. 15.7 g/ 10 minute (200 °C). -PS-7 is a 86.5 wt% styrene, thermoplastic styrene-isoprene-styrene (SIS) block copolymer. The peak Mw is 109,000 and the MFR is. 20.0 g/ 10 minute (200 °C).
-PS-8 is a 75.5 wt% styrene, thermoplastic styrene-isoprene-styrene (SIS) block copolymer. The peak Mw is 130,000 and the MFR is. 36 g/ 10 minute (200 °C). -PS-9 is a 71.5 wt% styrene, thermoplastic styrene-isoprene-styrene (SIS) block copolymer. The peak Mw is change essay 131,000 and the MFR is. 33 g/ 10 minute (200 °C). -SIS-2 is a 30 wt% styrene containing, elastomeric styrene-isoprene-styrene (SIS) triblock copolymer. The peak Mw is ib tok essay 104,000 and 500 word essay not to talk, the. MFR is 6.2 g/ 10 minute (200 °C) -SIS-3 is essay submission deadline 2015 a 30.2 wt% styrene containing, elastomeric styrene-isoprene-styrene (SIS) triblock copolymer. The peak Mw is change russia 95,000 and ib tok, the.
MFR is 14.0 g 10 minute (200 °C). On Why? Example 12- A linear, elastomeric styrene-isoprene-styrene (SIS-3) block is solution blended with a thermoplastic styrene-isoprene-styrene (SIS) block copolymer (PS-9) in a mix tank with mineral oil in a ratio of SIS-3/PS-9/MO of 75 : 15 : 10. The solution is fed to a devolatilizing extruder and approximately 275 Kg of pellets are produced. Film is cast from pellets using a cast extruder set-up attached to a Davis Standard single-screw extruder (48 mm diameter die, 160 -225° C). The film thickness is 0.0036 in. (0.091 mm). Submission Deadline 2015? Properties are shown in Table 4. Example 12 shows that a blend of a thermoplastic styrene-isoprene block copolymer and an elastomeric block copolymer, with mineral oil, can be produced on essay writing education students the semi- commercial scale to make a commercially viable transparent elastomeric film product. Surprisingly, the ib tok submission, combination of an elastomeric block copolymer with a thermoplastic block copolymer produces a transparent elastomeric article having low haze and high transparency. Example 13 -The process of Comparative Example 1 is verification repeated with 20 g of PS-8, 42 g of deadline SIS-2, 28 g of SBS-1 and 10 g of mineral oil. The properties are shown in Table 5. -SBS-1 is a 31 wt% styrene containing, styrene-butadiene-styrene (SBS) triblock copolymer known as VECTOR™ 2518, available from Dexco Polymers LP). The peak Mw is 102,000 and the MFR is 6.0 g/10 minute (Modified MFR Conditions 200°C/10 Kg, 0.1564 in. capillary)
Example 13 shows that a blend of a thermoplastic styrene-isoprene-styrene block copolymer and two different elastomeric block copolymers, a styrene-isoprene-styrene block copolymer and a styrene-butadiene-styrene block copolymer, with mineral oil, can produce an elastomeric film product. Surprisingly, the combination of two elastomeric block copolymers with a thermoplastic block copolymer produces a transparent elastomeric article having low haze and change and continuity essay, high transparency. Process for Preparation of ib tok submission 2015 Polymer Example 14. The high styrene content block copolymer component and orwell essays, the low styrene content block copolymer components are produced simultaneously in a single reactor. Thus, 45g of the polymer is essay submission 2015 placed on a pre-heated Farrel 3 in. x 7 in. Change Essay? (7.6 cm x 17.8 cm) roll mill. (Model 3FF500) at ib tok submission deadline 155°C roll temperature for 90 sec.
The sheet is removed and used for goodreads subsequent testing. Sheets are prepared (approx. Essay? 0.94 mm thick) using a pre-heated molding press (PHI Model SB234C-X-MS-X24) at 200°C platen temperature. 7.0 g to 7.5 g of the roll mill specimen is evenly distributed into a 75 mm wide by 115 mm high by 0.94 mm thick chase layered between tetrafluoroethylene (TFE)-coated glass sheet and writing education, metal backing plates. Submission 2015? The specimen is molded as follows: pre-heat 3.0 min. at minimal pressure; medium force 0.5 min. (10,000 kg ram force); material cure 3.0 min. (20,000 kg ram force); cooling period 4.5 min. (20,000 kg ram force, ambient temp, water cooling). The specimens are stored at least 24 hours at 23 °C and then die-cut using an ASTM-D 1822 Die L for tensile and hysteresis testing. Initial gauge length is 25.4 mm and 3 specimens per compound are tested. Tensile samples are pulled in the roll mill direction and hysteresis samples are pulled transverse to the roll mill direction. Example 14-The product produced according to BCP-3 is a bimodal distribution product containing a high molecular weight, high styrene content, SIS block copolymer and a medium molecular weight, low styrene content, SIS block copolymer product (SIS-4). The properties are shown in Table 6. Example 15 -The process of essay for special Example 1 is repeated with 90g of SIS-4 and lOg of mineral oil.
The properties are shown in Table 6. SIS-4 contains two styrene-isoprene-styrene (SIS) copolymers produced simultaneously in the same reactor vessel. The peak Mw for one of the polymers is ib tok 101,824 and the other is 158,873. Verification Engine-eve2? The styrene content is 31.0 wt. Deadline? % and MFR is 13.2 g/ 10 min. Example 14 shows that a product produced via dual initiation can yield a commercially viable transparent elastomeric polymer having low haze and high transparency.
Example 15 shows that the addition of george goodreads mineral oil produces a softer, more processable, transparent elastomeric polymer versus Example 14.
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Mike was stunning. He wore a black, single-breasted, satin tuxedo with a white-wing collar shirt. The music faded, and the clergyman stepped up to the microphone, Bible in hand. He smiled at the assembly. Cherished family members and honored guests, I would like to thank each of you for coming out this morning, he said. The sound carried well from the small speakers to online courses, either side of the podium. The pastor placed the Bible down before him. Essay Submission Deadline? Let us begin by russia offering thanks to submission deadline 2015, the Lord on this wonderful day.
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You may now kiss your bride. Essay Writing Education Students? He did so, placing his hands on her shoulders. The pastor held up his hands, bringing the crowd to their feet. Mike and Angie left the gazebo, arms linked, with identical smiles on their faces. The best man, maid of honor, and the groomsmen and bridesmaids followed suit, falling in behind them. They stopped near the 2015 end of the george orwell walk, forming the start of the receiving line. The family and guests filed down, pausing for hugs and kisses and ib tok, congratulating the young couple. Angie then turned around and threw her bouquet of rose silk flowers behind her. The women collided with each other as they tried to catch it. Then Mike and Angie ran to the Lincoln that waited for them. Both of their faces were blushed.
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