链中改性溶聚丁苯橡胶对白炭黑分散性影响的实验研究和分子模拟  

Experimental Study and Molecular Simulation of Silica Dispersion in In-chain Modified SSBR

作　　者：罗开强[1] 罗艳龙[1] 刘昊北 赵秀英[1] 吴丝竹[1] LUO Kaiqiang LUO Yanlong LIU Haobei ZHAO Xiuying WU Sizhu(Beijing University of Chemical Technology, Beijing 100029, China)

机构地区：[1]北京化工大学材料科学与工程学院,北京100029

出　　处：《轮胎工业》2017年第7期404-409,共6页Tire Industry

基　　金：国家自然科学基金资助项目(51473012;51320105012);国家科技支撑计划项目(2014BAE14B01)

摘　　要：通过接枝改性的方法制备不同改性剂3-巯基丙酸质量分数的溶聚丁苯橡胶(M-SSBR),研究其对白炭黑分散性的影响。试验结果表明:随着改性剂质量分数增大,M-SSBR中白炭黑的分散性提高;与未改性M-SSBR相比,改性M-SSBR的抗湿滑性能提高,滚动阻力降低。分子模拟研究表明:改性剂质量分数为0.142时,M-SSBR中白炭黑的分散性最好;氢键、3-巯基丙酸空间位阻和橡胶-橡胶分子链之间相互作用力的共同作用导致改性剂质量分数存在最佳值使白炭黑具有较好的分散性。In this study,solution polymerized styrene butadiene rubber（SSBR）was modified by grafting different amount of modifier 3-mercaptopropionic acid and the effect of in-chain modified SSBR（ M-SSBR） on the dispersion of silica was investigated.The test results showed that with the mass fraction of modifier increasing,the dispersion of silica in M-SSBR was improved.Compared with unmodified SSBR,the wet skid resistance of the modified M-SSBR was better and rolling resistance was lower.The study of molecular simulation showed that the dispersion of silica in M-SSBR was the best when the mass fraction of modifier was 0.142,which was the balanced results of the hydrogen bond,steric hindrance of 3-mercaptopropionic acid and interaction between rubber-rubber molecular chains.

关 键 词：改性剂 溶聚丁苯橡胶 白炭黑 分散性 分子模拟 

分 类 号：TQ333.1[化学工程—橡胶工业] TQ330.383.7