烯烃配位聚合的链转移反应以及应用  

Chain Transfer Reactions and Applications in Olefin Coordination Polymerization

作　　者：刘照贺 LIU Zhao-he(SINOPEC(Beijing)Research Institute of Chemical Industry Co.,Ltd.,Beijing 100013,China)

机构地区：[1]中石化(北京)化工研究院有限公司,北京100013

出　　处：《化学试剂》2023年第5期33-40,共8页Chemical Reagents

摘　　要：链转移反应在烯烃配位聚合过程中占据重要位置,不仅可以控制聚合物的分子量,甚至还可以利用链转移反应调控聚合物的拓扑结构。以均相催化剂催化烯烃配位聚合过程中的链转移反应为切入点,讨论了常见的链转移反应、向催化体系加入合适的链转移剂合成功能化基团封端的聚烯烃、配位聚合中聚合物链向溶剂甲苯转移的新颖链转移反应,以及通过链转移反应控制聚合物拓扑结构的机理,最后以氢气(H_(2))为链转移剂,分别讨论了对非均相催化剂催化乙烯和丙烯聚合活性的影响机制。Chain transfer reaction plays an important role in coordination polymerization,which could not only control the average molecular weight of the polymer,but also regulate the topology of the polymer.This review started from the chain transfer reactions in coordination polymerization by using homogeneous catalyst,discussed respectively the usual mode of the chain transfer reactions,the synthesis of chain-end functionalized polyolefin by adding the proper chain transfer agent to the catalytic system,chain transferring to solvent toluene in coordination polymerization as a novel mode,the mechanism of chain transfer reactions affecting polymer topology.In the end,the influence mechanism of H 2 as chain transfer agent in the polymerization activity of ethylene and propylene by using heterogeneous catalyst were discussed in detail.

关 键 词：链转移反应 均相催化剂 非均相催化剂 分子量 拓扑结构 

分 类 号：O632.12[理学—高分子化学]