共聚法负载茂钛催化剂的合成及催化苯乙烯配位聚合  

STUDY ON THE POLYMERIZATION OF STYRENE WITH COPOLYMER-SUPPORTED METALLOCENE/ GRIGNARD REAGENT(RMgBr) CATALYTIC SYSTEM

作　　者：王月欣[1] 姚艳梅[1] 王家喜[1] 杨利营[1] 张留成[1] 

机构地区：[1]河北工业大学化工学院,天津300130

出　　处：《高分子材料科学与工程》2004年第2期36-39,共4页Polymer Materials Science & Engineering

基　　金：国家自然科学基金青年基金资助项目(29604001);河北省自然科学基金资助项目(296018)

摘　　要：通过将带有不饱和双键的茂化合物(对-(1-环戊二烯甲基)-苯乙烯)与苯乙烯、二乙烯基苯共聚,再与乙基锂反应,最后与钛酸四丁酯络合的方法合成负载茂钛催化剂。将此催化剂与格氏试剂(RMgBr)组成催化体系,考察了催化反应温度、催化体系的组成,催化剂浓度和Mg/Ti摩尔比等因素对苯乙烯聚合的影响。结果表明,负载化可减少活性中心的偶联衰减,提高催化活性。催化活性与负载催化剂的结构、反应条件等因素密切相关。The polymer-supported metallocene catalyst was prepared by first copolymerization of metallocene with unsaturated double bond substituent, styrene and divinyl benzene, and then reacted with ethyl lithium, finally complexed by tetrabutyl titanate. Polymerizations of styrene were attempted in the presence of the supported metallocene catalytic system. Polymerization reactions were investigated at different polymerization conditions such as polymerization temperature,kinds of grignard reagents, Mg/Ti mole ratio and so on. The results demonstrated that catalytic activity of metallocene is increased by supported and catalytic activity of the supported catalyst is depended on the structure of copolymer-supported metallocene, polymerization conditions.

关 键 词：负载催化剂 茂金属化合物 苯乙烯 配位聚合 乙基锂 催化反应温度 催化剂浓度 摩尔比 

分 类 号：TQ314.242[化学工程—高聚物工业] TQ316.332