橡胶-填料相互作用对溶聚丁苯橡胶/白炭黑复合材料力学性能的影响  

Effect of Rubber-Filler Interaction on the Mechanical Properties of SSBR/Silica Composites

作　　者：邵红琪 贺炅皓 尉行 朱光苗[3] Hongqi Shao;Jionghao He;Hang Wei;Guangmiao Zhu(Otsuka Material Science and Technology(Shanghai)Co.,Ltd.,Shanghai 200233,China;Shandong Institute of Scientific and Technical Information,Jinan 250101,China;School of Applied Technology Qingdao University,Qingdao 200266,China)

机构地区：[1]大冢材料科技(上海)有限公司,上海200233 [2]山东省科学技术情报研究院,山东济南250101 [3]青岛大学应用技术学院,山东青岛200266

出　　处：《高分子材料科学与工程》2019年第10期90-95,101,共7页Polymer Materials Science & Engineering

摘　　要：研究了3种不同改性方式的溶聚丁苯橡胶对白炭黑分散效果及复合材料力学性能的影响。结果表明,主链改性的溶聚丁苯橡胶(HPR850和LRE-100)可以明显减弱复合材料中填料的Payne效应,延长小形变的线性平台,改善填料在橡胶基体中的分散,应变扫描的tanδ明显降低;其中多官能化改性的LRE-100具有更加优异的性能,表征Payne效应的(G0′-G∞′)从RC2557S的4.59 MPa降低至1.27 MPa,同时tanδ也降低了38.7%。通过分子链改性后溶聚丁苯橡胶与顺丁橡胶的相容性发生变化,Tg向高温移动,其中LRE-100可以提高填料的分散性,Tg处的tanδ峰值升高,引起了复合材料在0℃附近具有较高的损耗因子(tanδ),60℃附近具有较低的tanδ。对于表征填料-填料和填料-橡胶相互作用的表观活化能,通过计算发现LRE-100具有最低的活化能,说明了填料优异的分散性和填料与橡胶分子链的作用增强,而不是单纯的物理吸附作用。The effect of three kinds of chain features on the silica dispersion and mechanical properties of solution styrene butadiene rubber(SSBR)/silica composites was investigated. The results show that chain modified SSBR(HPR850 and LRE-100) could weaken Payne effect significantly, accompanied by prolonging the linear plateau in the small magnitude, which is attributed to the better dispersion of filler in the rubber matrix, so the heat build-up(tanδ) of composites could be reduced. LRE-100 shows the best dynamic property, the Payne effect(G0′-G∞′) could be reduced from 4.59 MPa(RC2557 S composite) to 1.27 MPa, meanwhile tanδ is reduced by 38.7%. The compatibility of SSBR and butadiene could be changed by the chain modification of SSBR, so Tg of the composites would shift to a high temperature;and for the better dispersion of silica, tanδ of LRE-100 composite at Tg would increase, which is beneficial to tanδ at 0℃, meanwhile tanδ at 60℃ is reduced. It could also be found that LRE-100 has the lowest apparent activation energy, which is used to characterize the filler-rubber interaction. This indicates the reinforced interaction of fillers and rubber chains, and not merely physical adsorption.

关 键 词：改性溶聚丁苯橡胶 白炭黑 PAYNE效应 损耗因子 力学性能 

分 类 号：TQ333.1[化学工程—橡胶工业]