树状分子引发苯乙烯的原子转移自由基聚合  

Dendritic initiator for the atom transfer radical polymerization of styrene

作　　者：赵优良[1] 习复[1] 

机构地区：[1]中国科学院化学研究所,北京100080

出　　处：《弹性体》2001年第3期20-23,共4页China Elastomerics

摘　　要：从第 2代端羟基树状聚芳醚出发 ,合成了 2 -溴异丁酸聚芳醚酯 (G2 -Br) ,并用红外、核磁、MALDI-TOF质谱和元素分析对其进行了表征。以G2 -Br为大分子引发剂 ,在CuBr/ 2 ,2′ -联吡啶催化剂作用下引发苯乙烯的原子转移自由基聚合。考察了聚合时间、单体和引发剂配比、聚合温度等因素对聚合的影响 ,合成了结构规整、分子量分布较窄的树状By reaction of the hydroxy terminated polyarylether dendron with 2 bromoisobutyryl bromide catalyzed by triethylamine,the dendritic polyarylether 2 bromoisobutyrate(G2 Br) was first prepared.The compound was characterized by FTIR, 1HNMR,MALDI TOF MS and elemental analysis.G2 Br as the macromolecular initiator for the controlled free radical polymerization of styrene was investigated.Effects of polymerization time,ratios of monomer to initiator,and reaction temperature on polymerization were studied.It is found that the resulting copolymers possess well defined molecular weights and low polydispersities.

关 键 词：树状分子 树状-线型嵌段共聚物 原子转移自由基聚合 聚苯乙烯 ATRP 引发剂 

分 类 号：TQ325.2[化学工程—合成树脂塑料工业]