支化聚甲基丙烯酸甲酯的合成及表征  

Synthesis and Characterization of Branched Polymethyl Methacrylate

作　　者：姜扣琴[1] 黄文艳[1] 刘静[1] 任强[1] 蒋必彪[1] 

机构地区：[1]江苏工业学院材料科学与工程学院,江苏常州213164

出　　处：《江苏工业学院学报》2009年第2期1-4,共4页Journal of Jiangsu Polytechnic University

基　　金：国家自然科学基金(20574032);江苏省自然科学基金(BK2007045)

摘　　要：以α-溴代异丁酸叔丁酯(t-BBiB)为引发剂,CuBr/2,2′-联吡啶(Bpy)为催化体系,甲基丙烯酸甲酯(MMA)为单体,双甲基丙烯酸乙二醇酯(EGDMA)为支化单体,苯甲醚为溶剂,在90℃下经原子转移自由基聚合(ATRP)反应合成支化聚合物。用气相色谱(GC)、凝胶渗透色谱(GPC)、多角激光散射仪(MALLS)等分别对聚合反应过程和聚合物性能进行了分析和表征。研究结果表明:该体系反应初期主要生成含有悬垂双键的初级链,后期悬垂双键被引发使初级链偶合生成支化聚合物。随着聚合反应的进行,分子质量增大,Zimm相对支化因子g′变小,支化程度变大。The branching polymerization of methyl methacrylate was carried out via atom transfer radical polymerization at 90℃with ethylene glycol dimethyl acrylate as the branching agent, tert--butyl--2-- bromoisobutyrate and anisole were used as the initiator and the solvent. The obtained polymers were characterized by GC, GPC and MALLS, etc. The formation of highly branched molecules mainly occurs at the last stages of the reaction by the reaction of the pendent double bonds. The branching degree of the resulting polymers increased with molecular weight.

关 键 词：支化聚合物 原子转移自由基聚合 双甲基丙烯酸乙二醇酯 甲基丙烯酸甲酯 

分 类 号：O63[理学—高分子化学]