n-BuLi/四氢呋喃/t-BuOK体系引发苯乙烯-异戊二烯-丁二烯三元共聚合(英文)  

Styrene-isoprene-butadiene terpolymerization initiated by n-BuLi/tetrahydrofuran/t-BuOK

作　　者：任春晓[1] 王玉荣[1] 王启飞 于国柱 齐玉霞 李杨[1] 

机构地区：[1]大连理工大学高分子材料系,辽宁大连116012 [2]北京燕山石油化工股份有限公司研究院,北京102500

出　　处：《合成橡胶工业》2007年第2期157-157,共1页China Synthetic Rubber Industry

基　　金：Supported by China Petrochemical Corporation(405095)

摘　　要：以n-BuLi为引发剂,t-BuOK为助引发剂,四氢呋喃(THF)为极性调节剂,己烷/环己烷为溶剂,在聚合温度为60℃时进行苯乙烯-异戊二烯-丁二烯集成橡胶(SIBR)负离子三元共聚合,考察了THF/n-BuLi及t-BuOK/n-BuLi(摩尔比)对SIBR微观结构含量和玻璃化转变温度(Tg)的影响。结果表明:t-BuOK/n-BuLi为0.08时,THF/n-BuLi从5增加到20,三元共聚物中聚丁二烯和聚异戊二烯链段中1,2 -结构和3,4 -结构质量分数分别增加约2.5%和5.5%,而Tg上升10℃左右;当THF/n-BuLi为10时,t-BuOK/n-BuLi从0.04增加到0.15,其聚合物微观结构和Tg变化不明显。Styrene-isoprene-butadiene rubber （SIBR） as tire tread has excellent characteristics. And it has been synthesized successfully twenty years before. But the terpolymer synthesis with t-BuOK and tetrahydrofuran （THF） has not been reported. In this work, the anionic terpolymerization of styrene, isoprene and butadiene was carried out using n-BuLi as initiator, t-BuOK as coinitiator, THF as polar regulator, hexane/cvclohexane as solvent, at 60 ℃.

关 键 词：集成橡胶 负离子三元共聚合 正丁基锂 叔丁氧基钾 四氢呋喃 

分 类 号：TQ330.1[化学工程—橡胶工业]