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Comparing strategies for the synthesis of polyolefinic thermoplastic elastomers via macromonomer incorporation

机译：通过掺入大分子单体合成聚烯烃热塑性弹性体的比较策略

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This microstructure of polyolefinic thermoplastic elastomers made with a combination of two single-site catalysts was analyzed by Monte Carlo simulation. The model can be used to describe the crystallizable fraction for both long-chain branched polypropylene (aPP-g-iPP) and long-chain branched ethylene/alpha-olefin copolymers (PEalphaO-g-PE). The simulations showed that at levels of 7.5% of comonomer incorporation, PEalphaO-g-PE samples reach a similar crystallizability level of aPP-g-iPP. From a topological point of view, it was demonstrated that the fraction of free arms and inner segments tend to the limit of 1/2 for highly branched chains and that the fraction of free arms reaches its maximum value when the Y-type chains are the predominant population. A mathematical correlation between the linear- and LCB catalyst probabilities was proposed to ensure the production of symmetrical branched chains. [References: 19]
机译：通过蒙特卡罗模拟分析了由两种单中心催化剂组合制得的聚烯烃热塑性弹性体的这种微观结构。该模型可用于描述长支链聚丙烯（aPP-g-iPP）和长支链乙烯/α-烯烃共聚物（PEalphaO-g-PE）的可结晶级分。模拟显示，在共聚单体掺入量的7.5％时，PEalphaO-g-PE样品达到了与aPP-g-iPP相似的结晶度。从拓扑学的角度来看，已证明对于高支链，自由臂和内部链段的分数趋向于1/2的极限，并且当Y型链为自由链时，自由臂的分数达到最大值。主要人口。提出了线性和LCB催化剂概率之间的数学关联，以确保产生对称的支链。 [参考：19]

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