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.
出处
《合成橡胶工业》
CAS
CSCD
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)
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
cobalt naphthenate
triisobutylaluminium
carbon disulfide
isoprene
bulk polymerization
catalytic activity
microstructure
intrinsic viscosity
作者简介
作者简介:王鹏(1984-),男,硕士研究生。已发表论文4篇。