Isotactic poly(1‐butene)s (iPBs) were synthesized via bulk polymerization of 1‐butene in the presence of a series of nucleating agents (NAs). The effects of the NAs on the polymerization, crystallization and mechanical properties of the resultant iPBs were systematically investigated. Both α‐ and β‐NAs effectively improve the impact resistance of iPB. Specifically, the addition of β‐NAs increases the molecular weight, tensile strength, elastic and flexural moduli of iPB without affecting catalytic activity during polymerization, while the α‐NAs have no affirmative effect on improving the tensile strength and elastic modulus of iPB. The β‐NAs also accelerate the crystal transition rate of iPB from form II to form I. © 2020 Society of Chemical Industry

中文翻译：

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在成核剂的存在下，由齐格勒-纳塔催化的1-丁烯聚合反应合成的聚（1-丁烯）的热力学性质

在一系列成核剂（NAs）存在下，通过1-丁烯的本体聚合合成了全同立构聚（1-丁烯）（i PB）。系统地研究了NAs对所得i PBs的聚合，结晶和机械性能的影响。α‐和β‐NA均可有效提高i PB的抗冲击性。具体而言，添加β - NAs可增加i PB的分子量，抗张强度，弹性和弯曲模量，而不会影响聚合过程中的催化活性，而α - NAs对改善i PB的抗张强度和弹性模量没有肯定作用。在β -NA还可以加速i PB从II到I的晶体转变速率。©2020年化学工业协会