Stereoblock polypropylenes bearing isotactic, atactic, and syndiotactic polypropylene segments were successfully prepared by dry methyl aluminoxane activated binary catalysts system, Ph₂CFluCpZrCl₂ and {Me₂Si(2,5-Me₂-3-(2-MePh)-cyclopento[2,3-b]thiophen-6-yl)₂}ZrCl₂, in the presence of iBu₃Al as a chain shuttling agent. By studying the catalyst activity, chain transfer efficiency, and reversibility of chain transfer reaction of each catalyst system, as well as the molecular weight and polydispersity of the resulting polymers, the alkyl exchange reactions between the zirconium catalyst and different main-group metal alky were estimated, respectively. Based on the optimized react condition, the chain shuttling polymerization was conducted by binary catalyst system in the presence of iBu₃Al under both atmospheric and high pressure. Resultant polymers were identified as stereoblock polypropylenes according to microstructure and physical properties analyses by ¹³C{¹H}-NMR, DSC, and GPC.

通过干燥的甲基铝氧烷活化的二元催化剂体系Ph ₂ CFluCpZrCl ₂和{Me ₂ Si（2,5-Me ₂ -3-（2-MePh）-cyclopento [] ，成功地制备了具有等规，无规和间规聚丙烯链段的立体嵌段聚丙烯。i Bu ₃存在下的2,3- b ]噻吩-6-基）₂ } ZrCl ₂Al作为链穿梭剂。通过研究每种催化剂体系的催化剂活性，链转移效率和链转移反应的可逆性，以及所得聚合物的分子量和多分散性，锆催化剂与不同主族金属烷基之间的烷基交换反应为估计。基于最佳反应条件，在i Bu ₃ Al存在下，在大气压和高压下，通过二元催化剂体系进行链穿梭聚合。根据通过¹³ C { ¹ H} -NMR，DSC和GPC的微观结构和物理性质分析，将所得聚合物鉴定为立体嵌段聚丙烯。