橡胶技术网

合成橡胶工业
CHINA SYNTHETIC RUBBER INDUSTRY
2000 Vol.23 No.1 P.11-12

数字化期刊

"活性”自由基聚合法合成支链结构可控的SBS-g-PMMA

Synthesis of SBS - g - PMMA with well - controlled branch chain by "living” radical polymerization

王晓松  罗宁  应圣康 

摘 要:通过活性/可控自由基聚合合成了支链结构可控的SBS-g-PMMA接枝共聚物.首先以SBS与N-溴代丁二酰亚胺反应合成溴代SBS(SBS-Br),并对SBS-Br中烯丙基溴(-Br)的含量进行定量分析;然后以此SBS-Br为大分子引发剂在CuX/bpy(x=Cl,Br;-Br:CuX:bpy=1:1:3)存在下引发MMA进行接枝共聚.在以CuCl/bpy体系催化的接枝共聚合中,动力学特征为一级,表明聚合过程中活性种浓度是恒定的.同时接枝率与接枝链的长度均随反应时间的延长而增加,聚合过程中,接枝效率始终保持在90%以上,最高可达到96%.但以CuBr/bpy为催化剂时,聚合进行数小时后即有终止反应发生,接枝率低,接枝效率只有70%左右.
关键词:活性/可控自由基聚合;苯乙烯-丁二烯嵌段共聚物;聚甲基丙烯酸甲酯;接枝共聚物

基金项目:All correspondences should be addressed. Foundation item: Supported by National Natural Science Foundation of China(29634010-2);Shanghai Educational Development Foundation (SG 97008).
作者单位:王晓松(华东理工大学活性聚合实验室.上海,200237) 
     罗宁(华东理工大学活性聚合实验室.上海,200237) 
     应圣康(华东理工大学活性聚合实验室.上海,200237) 

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收稿日期:1999年10月11日

修稿日期:1999年10月11日

出版日期:2000年1月1日