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Title:: Synthesis of allyltrimethoxysilane end-capped solution polymerized styrene-butadiene rubber

作者:: 杨潇寒¹; 王文恒¹; 廖明义¹; 王雪²; 1．大连海事大学交通运输工程学院，辽宁大连 116026； 2．中国石化北京北化院燕山分院，北京 102500

Author(s):: YANG Xiao-han¹; WANG Wen-heng¹; LIAO Ming-yi¹; WANG Xue²; 1. College of Transportation Engineering， Dalian Maritime University， Dalian 116026， China; 2. Yanshan Branch of Beijing Research Institute of Chemical Industry， SINOPEC， Beijing 102500， China

Keywords:: solution polymerized styrene-butadiene rubber; allyltrimethoxysilane; anionic polymerization; terminating efficiency; microstructure

摘要:: 以丁二烯和苯乙烯为单体、正丁基锂为引发剂、双四氢糠丙烷为结构调节剂、1,1-二苯基乙烯为“盖帽剂”、烯丙基三甲氧基硅烷（TIOS）为封端剂，采用负离子聚合法合成了TIOS封端的溶聚丁苯橡胶（SSBR）。采用凝胶渗透色谱和核磁共振波谱表征了封端前后SSBR的结构和分子量及其分布，考察了封端反应时间、反应温度、TIOS用量及SSBR分子量对封端效率的影响。结果表明，封端反应时间为30 min、反应温度为60 ℃、TIOS与正丁基锂摩尔比为2.0及SSBR相对分子质量约为60 000时封端效率较高。

Abstract:: Allyltrimethoxysilane （TIOS） terminating solution polymerized styrene-butadiene rubber （SSBR） was synthesized by using butadiene and styrene as monomers， n-butyllithium （n-BuLi） as initiator， 2，2-di（2-tetrahydrofuryl）propane as structure regulator ， 1，1-diphenylethylene as a capping agent and via anionic polymerization. The structure， molecular weight and its distribution of SSBR-TIOS before and after capping were characterized by proton nuclear magnetic resonance spectroscopy and gel permeation chromatography， respectively. The effects of capping reaction time and temperature， TIOS amount and SSBR molecular weight on the terminating efficiency were investigated. The results showed that the terminating efficiency reached the highest value when the capping reaction time was 30 min， reaction temperature was 60 ℃， molar ratio of TIOS/n-BuLi was 2.0 and molecular weight of SSBR was about 60 000.