含硅基团有机锂引发剂制备星型溶聚丁苯橡胶  

Formation of star styrene-butadiene solution rubber initiated by a silicon-containing organolithium initiator

作　　者：孔欣欣[1] 张海燕[1] 姚明[1] 张兴英[1] 

机构地区：[1]北京化工大学新型高分子制备与加工北京市重点实验室,北京100029

出　　处：《北京化工大学学报（自然科学版）》2010年第1期85-88,共4页Journal of Beijing University of Chemical Technology(Natural Science Edition)

基　　金：国家自然科学基金(50573005)

摘　　要：三甲基氯硅烷与双端活性锂引发剂反应,制得了一种含硅基团有机锂引发剂,用该引发剂引发丁二烯和苯乙烯聚合,用四氯化锡偶联,得到端基为含硅基团的星型丁苯橡胶,并对上述合成反应工艺条件进行了初步研究。结果表明,四氯化锡的用量和加入方式以及端基转换均对偶联效率有影响,四氯化锡与活性分子链的物质的量比为0.2625,且在转换端基的条件下分2次加入时,所得星型丁苯橡胶的偶联效率最高为85.93%。An organolithium initiator containing a silicon-carbon bond has been synthesized by the reaction of chlorotrimethylsilane and a dilithium initiator. The resulting novel initiator was used for the copolymerization of styrene and butadiene. The resulting styrene-butadiene copolymers were coupled by tin tetrachloride, which afforded a star styrene-butadiene solution rubber with a silicon-containing terminal group. The results show that changing the a- mount and way of addition of tin tetrachloride, as well as changing the terminal monomer in the polymer chain all have a significant effect on the coupling efficiency. The maximum coupling efficiency of the star styrene-butadiene rubber was 85.93%, obtained when the molar ratio of tin tetrachloride and active chains was 0. 2625, tin tetrachloride was added in two portions and with the terminal styrene moiety exchanged for butadiene.

关 键 词：有机锂引发剂 三甲基氯硅烷 偶联 阴离子聚合 星型溶聚丁苯 

分 类 号：TQ333.1[化学工程—橡胶工业]