间断聚合法制备宽相对分子质量分布的溶聚丁苯橡胶  

Preparation of wide molecular weight distribution SSBR by discontinuous method

作　　者：邢立江 张颖[2] 张新军[3] 张建国[1] XING Lijiang;ZHANG Ying;ZHANG Xinjun;ZHANG Jianguo(Baling Sinopec petrochemical Industries Co.,Yueyang 414014,China;Central-Ching Company,Sinopec Chemical Commercial Holding Company Limited,Wuhan 430062,China;Beijing Research & Design Institute of Rubber Industry,Beijing 100143,China)

机构地区：[1]中国石化巴陵石化公司合成橡胶事业部,湖南岳阳414014 [2]中国石化化工销售华中分公司,湖北武汉430062 [3]北京橡胶工业研究设计院,北京100143

出　　处：《弹性体》2020年第5期16-21,共6页China Elastomerics

摘　　要：用连续加料法,在正丁基锂(NBL)、支化和官能化试剂等的作用下,合成了苯乙烯-丁二烯无规共聚溶聚丁苯橡胶(SSBR),共聚物具有不对称性长支化链、多端基被极性基团封闭等特点。结果表明,合成的多端基封端丁苯橡胶(nF-SSBR)具有适宜的分子链缠结度和高的触变性能,相对分子质量分布指数(Mw/Mn)高达1.8~2.0;相比通用型SSBR,用作高性能轮胎胎面胶体现出优良的加工性能、低的压缩生热、高的抓地性和低的滚动阻力。Under the action of n-butyllithium,branching and functionalizing reagents,the styrene-butadiene random copolymerized polystyrene-butadiene rubber(SSBR)was synthesized by liaison feed method.The copolymer has asymmetry long branches chains and the polyterminal groups are closed by polar chemical groups.The test results show that,the synthesized multi-end-blocked SSBR(nF-SSBR)has suitable molecular chain entanglement and high thixotropic performance,and the molecular mass distribution index(Mw/Mn)is up to 1.8~2.0;Compared with the universal SSBR,nF-SSBR shows excellent processing performance,low compression heat generation,high grip,and low rolling resistance.

关 键 词：连续加料 多官能化溶聚丁苯橡胶 末端封闭 触变性 滚动阻力 

分 类 号：TQ333.1[化学工程—橡胶工业]