钼系催化剂催化异戊二烯聚合研究  

Research on Polymerization of Isoprene Catalyzed With Molybdenum Series Catalysts

作　　者：王鹏[1,2] 徐召来[1] 邵华锋[1] 姚薇[1] 黄宝琛[1] 

机构地区：[1]青岛科技大学橡塑材料与工程教育部重点实验室,山东青岛266061 [2]青岛伊科思新材料股份有限公司,山东青岛266061

出　　处：《化学推进剂与高分子材料》2010年第2期52-54,64,共4页Chemical Propellants & Polymeric Materials

基　　金：国家自然科学基金资助项目(20674042)

摘　　要：以磷酸三丁酯取代的五氯化钼(简称Mo)及间甲酚取代的三异丁基铝(简称Al)为催化剂引发异戊二烯(Ip)聚合,考察了n(Mo):n(Ip)、n(Al):n(Mo)及聚合温度对单体转化率和催化剂效率的影响。采用FTIR和1H-NMR对聚合产物的微观结构进行测试表征,用DSC测定聚合产物的玻璃化转变温度(Tg);结果表明在反应温度为50℃、n(Mo):n(Ip)为4.0×10-4、n(Al):n(Mo)为30、聚合24h所得的聚异戊二烯(PIp)中1,4-结构摩尔分数为55.7%,3,4-结构的为22.5%和1,2-结构的为21.8%,该PIp的Tg为-35.1℃。The polymerization of isoprene was initiated using tributyl phosphate substituted molybdenum pentachloride（Mo for short） and m-cresol substituted triisobutyl aluminum（Al for short） as catalysts. The influence of n（Mo）：n（Ip）, n（A1）：n（Mo） and the polymerization temperature on the monomer conversion and catalyst efficiency was investigated. The microstructures of polymerization products were identified and characterized by FT-IR and 1H-NMR. The glass transition temperatures（Tg） of the polymerization products were determined by DSC. The results show that the obtained polyisoprene（PIp）contains 1,4-isomer of molar fraction 55.7%, 3,4-isomer of 22.5%, 1,2-isomer of 21.8%, and its Tg is -35.1 ℃when the reaction temperature is 50℃, n（Mo）： n（Ip）=4.0 ×10^-4, n（Al）： n（Mo）=30, and polymerization time is 24h.

关 键 词：钼系催化剂 三异丁基铝 异戊二烯 配位聚合 结构表征 

分 类 号：O632.12[理学—高分子化学]