自由基聚合制备甲基丙烯酸甲酯-苯乙烯嵌段共聚物  

Synthesis of methyl methacrylate-styrene block copolymer by using polyfunctional chain-transfer agent via conventional free radical polymerization

作　　者：罗志华[1] 谢富强[2] 夏柏如[1] 付志峰[3] 

机构地区：[1]中国地质大学(北京)工程技术学院,北京100083 [2]大港油田集团油田化学有限公司,天津300280 [3]北京化工大学化工资源有效利用国家重点实验室,北京100029

出　　处：《化工进展》2009年第9期1617-1619,共3页Chemical Industry and Engineering Progress

摘　　要：以偶氮二异丁腈为引发剂,乙二硫醇(EDT)为链转移剂进行甲基丙烯酸甲酯(MMA)的自由基聚合,得到了含有残余巯基的聚甲基丙烯酸甲酯大分子链转移剂(HS-PMMA),继而以HS-PMMA作为大分子链转移剂进行苯乙烯的自由基聚合,采用普通自由基聚合方法合成了结构可以设计的嵌段共聚物。Block copolymers were synthesized by conventional free radical polymerization in two steps by using polyfunctional chain transfer agent. In the first step, free radical polymerization of methyl methacrylate was carried out in the presence of a chain transfer agent, 1,2-ethanedithiol. Hence, PMMA with residual thiol groups at the chain end were obtained at appropriate monomer conversions. Thus prepared PMMA with residual thiol groups at the chain end was subsequently used in the second step as a macro-chain transfer agent, where conventional free radical polymerization of styrene was carded out yielding block copolymers of PMMA with polystyrene successfully.

关 键 词：嵌段共聚物 甲基丙烯酸甲酯 苯乙烯 普通自由基聚合 多官能团链转移剂 

分 类 号：O631.5[理学—高分子化学]