钴系催化剂催化异戊二烯的本体聚合  

Bulk polymerization of isoprene with cobalt catalyst system

作　　者：王鹏[1] 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266042

出　　处：《合成橡胶工业》2010年第6期429-432,共4页China Synthetic Rubber Industry

基　　金：国家自然科学基金资助项目(20674042)

摘　　要：以环烷酸钴(简称Co)-三异丁基铝(简称Al)-CS2为催化剂引发异戊二烯(Ip)本体聚合合成了聚异戊二烯(PI),考察了单体转化率、催化剂效率(CE)和聚合物特性黏数([η])的影响因素,并对PI的微观结构和玻璃化转变温度(Tg)进行了表征。结果表明,在Co/Ip(摩尔比)为4.0×10-4、Al/Co(摩尔比)为60、CS2/Co(摩尔比)为15、反应温度为50℃下聚合48 h所得PI中1,4-结构、3,4-结构、1,2-结构质量分数分别为18.6%,41.2%,40.2%,Tg为-6.5℃;反应温度对PI的[η]影响最大,随着反应温度的升高,[η]呈下降趋势,且均小于1 dL/g;其他聚合条件的变化对PI的[η]影响不大。The polyisoprene（PI） was prepared by bulk polymerization of isoprene（Ip） with cobalt naphthenate（simplified as Co）-triisobutylaluminium（simplified as Al）-carbon disulfide（CS2） catalyst system.The influencing factors of conversion,catalytic efficiency and intrinsic viscosity（[η]） were investigated.The microstructure and glass transition temperature（Tg） of PI were characterized.The results showed that the PI with 1,4-units of 18.6%,3,4-units of 41.2% and 1,2-units of 40.2% and Tg of-6.5 ℃ could be obtained under the conditions of Co/Ip（mole ratio） 4.0×10-4,Al/Co（mole ratio） 60,CS2/Co（mole ratio） 15,temperature 50 ℃,time 48 h.The reaction temperature affected [η]significantly,with increasing reaction temperature,[η] decreased,and all the [η]values less than 1 dL/g.Other polymerization conditions had little effect on the [η] of PI.

关 键 词：环烷酸钴 三异丁基铝 二硫化碳 异戊二烯 本体聚合 催化活性 微观结构 特性黏数 

分 类 号：O623[理学—有机化学]