均相稀土催化苯乙烯均聚及其与异戊二烯共聚  

Homopolymerization and copolymerization of styrene and isoprene with homogeneous rare earth catalyst system

作　　者：崔立强[1] 巴晓薇[1] 宋春雷[1] 滕洪祥[1] 应来强[1] 金鹰泰[1] 

机构地区：[1]中国科学院长春应用化学研究所

出　　处：《合成橡胶工业》1998年第6期325-329,共5页China Synthetic Rubber Industry

基　　金：中国科学院;中国石油化工总公司高分子化学联合开放实验室资助项目

摘　　要：采用新型稀土催化体系氯代三氟乙酸钕（Ｎｄ）－烷基铝（Ａｌ）－卤代烃（Ｘ），引发苯乙烯（Ｓｔ）均聚及其与异戊二烯（Ｉｐ）共聚。研究了催化体系各组分及陈化方式、Ｘ和Ａｌ种类及用量、溶剂种类等因素对苯乙烯聚合的影响，并用稀土催化剂实现了Ｓｔ－Ｉｐ嵌段共聚。用ＩＲ，ＮＭＲ及ＤＳＣ等方法表征了聚合物的结构，合成出的Ｓｔ－Ｉｐ二嵌段共聚物中，Ｉｐ链节以反式－１，４－结构为主，含少量３，４－结构，几乎不含顺式－１，４－结构。Styrene (St)homopolymerization and copolymerization with isoprene (Ip) initiated by a novel catalyst system(CF3COO)2 NdCl-Me3Al-allyl Br.The effect of components,aging matter, third components,aluminum alkyls and solvents on the polymerization of styrene were studied.Then the block copolymer of St and Ip was carried out successfully.The alleged polymer was characterized by IR,NMR and DSC.The Ip unit of St-Ip block copolymer was dominated by the trans-1,4-structure and few 3,4-structure without any cis-1,4-structure.

关 键 词：稀土催化剂 苯乙烯 异戊二烯 共聚 均聚 橡胶 

分 类 号：TQ330.11[化学工程—橡胶工业] TQ316.342