以二乙烯基苯为核的星形支化聚异丁烯的制备与表征  

Preparation and characterization of star-branched polyisobutylene with divinylbenzene as core

作　　者：龚惠勤[1] 伍一波[1] 郭文莉[2] 李树新[2] 商育伟[2] 金玉顺[2] 

机构地区：[1]北京化工大学材料科学与工程学院,北京100029 [2]北京石油化工学院材料科学与工程系,北京102617

出　　处：《合成橡胶工业》2008年第5期362-365,共4页China Synthetic Rubber Industry

基　　金：北京市教委科技发展计划项目(KM200510017002)

摘　　要：采用活性正离子聚合法,以2-氯-2,4,4-三甲基戊烷/四氯化钛为引发剂体系,一氯甲烷/环己烷(体积比50/50)为溶剂,在-80℃下合成了以二乙烯基苯为核、聚异丁烯(PIB)为臂的星形支化聚合物。考察了聚合物的臂长和核大小对星形支化PIB的影响,并对聚合物的结构进行了表征。结果表明,核的增大和聚合时间的延长,有利于接枝聚合反应的进行和星形支化聚合物的形成;聚合物分子在四氢呋喃稀溶液中的幂指数为0.14,说明该聚合物具有支化结构。Via living carbocationic polymerization, using 2-chloro-2,4,4-trimethyl pentane/TiCl4 as initiator system, CH3Cl/cyclohexane （volume ratio 50/ 50） as solution and divinylbenzene as core, starbranched polyisobutylene （PIB） was synthesized at -80℃. The effects of size of core and arm on starbranched PIB were studied and the structure of polymer was characterized. The results showed that enlargement of core size and extension of polymerization time were favorable for graft polymerization and starbranched polymer. The power index was 0.14, which indicated that the polymer had branched molecular structure in dilute solution of tetrahydrofuran.

关 键 词：二乙烯基苯 聚异丁烯 星形支化结构 活性正离子聚合 

分 类 号：O632.1[理学—高分子化学]