【摘要】 以α-溴代异丁酸叔丁酯(BIBTB)为引发剂,CuBr/Bpy为催化体系引发甲基丙烯酸甲酯(MMA)聚合得到大分子引发剂PMMA-Br,利用电荷转移络合物效应以PMMA-Br引发支化单体二苯甲烷双马来酰亚胺(BMI)和苯乙烯就地优先生成双官能团大分子引发剂再继续引发苯乙烯得异臂星状聚合物。采用1H-NMR、GPC、MALLS、FT-IR和DSC等方法对聚合反应过程、聚合物及其水解产物进行分析测试。研究结果表明:利用电荷转移络合物效应就地生成双官能团大分子引发剂合成异臂星状聚合物是可行的。更多还原

【Abstract】 This paper studied a novel approach to hetero-arm star-shaped polymers of MMA and styrene by means of atom transfer radical polymerization.PMMA-Br macroinitiator was prepared in bulk at first,then PMMA-Br was used as the initiator and macroinitiator bearing two initiator units was formed in-situ by atom transfer radical polymerization of the charge transfer complex system of styrene and biphenylmethane bismaleimide.1H-NMR,GPC,MALLS,FT-IR and DSC were used to monitor the polymerization processes and analysize the prepared polymers.The results prove that the hetero-arm star-shaped polymer of MMA/styrene with controlled structures has been prepared.更多还原