摘要
以硅烷偶联剂双[3-(三乙氧基硅)丙基]四硫化物(Si 69)和3-巯丙基乙氧基双(十三烷基-五乙氧基-硅氧烷)(Si 747)为改性剂,采用机械混炼法制备了白炭黑/溶聚丁苯橡胶/天然橡胶复合材料,研究了硅烷偶联剂种类和用量对复合材料微观结构、硫化特性、加工性能、物理机械性能、动态力学性能和成品轮胎性能的影响,以及复合材料结构与性能的关系。结果表明,相较于单独使用Si 69,添加Si 747后复合材料的焦烧时间和工艺正硫化时间均明显缩短,硫化速率随着Si 747用量的增加逐渐加快;硅烷偶联剂Si 69和Si 747协同改性使得复合材料的拉伸强度、回弹性和300%定伸应力等均降低;当Si 747用量增加时,用以表征复合材料储能模量对温度依赖性的活化能逐渐降低;添加Si 747后复合材料中白炭黑的分散性明显改善;单独使用Si 747改性的复合材料在0℃的损耗因子(tanδ)明显增加,而在60℃的tanδ明显降低;轮胎滚动阻力随着Si 747用量的增加逐渐降低。
Silica/solution-polymerized butadiene-styrene rubber(SSBR)/natural rubber(NR)compo-sites were prepared by mechanical mixing method with silane coupling agent,bis[3-(triethoxysilyl)propyl]tetrasulfide(Si 69)and 3-mercaptopropy-lethyoxyl-di(tridecyl-pentamethoxy)-silane(Si 747),as modifier and the effect of types and addtion amounts of silane coupling agent on the microstructure,curing characteristics,processing performance,physical and mechanical performance,dynamic mechanical properties,tire performance,and the relationship between structure and performance of the composite.The results showed that compared with the composite just only modified by Si 69,the incorporation of Si 747 resulted in the scorch time and optimum curing time of the composite shorten signi-ficantly,and the curing rate improved gradually with the increase in the addition amount of Si 747;the synergistic modification of Si 69 and Si 747 made the physical and mechanical properties,tensile strength,resilience and modulus at 300%of the composite all reduced;when the addition amount of Si 747 increased,the apparent activation energy which was used to characterize the temperature dependence of storage modulus of the composite reduced gradually;the dispersion of silica in the composite improved significantly after the addition of Si 747;the loss factor(tanδ)of the composite modified by Si 747 alone at 0℃increased significantly and tanδat 60℃decreased significantly;the rolling resistance of the tire improved gradually with the increase in the addition amount of Si 747.
作者
郑涛
龙飞飞
邵红琪
ZHENG Tao;LONG Fei-fei;SHAO Hong-qi(Shandong Fengyuan Tire Manufacturing Co Ltd,Zaozhuang 277300,China;Shandong Institute of Scientific and Technical Information,Jinan 250101,China)
出处
《合成橡胶工业》
CAS
北大核心
2023年第6期538-544,共7页
China Synthetic Rubber Industry
基金
山东省重大科技创新工程项目(2018 CXGC 0605)。
关键词
溶聚丁苯橡胶
天然橡胶
硅烷偶联剂
白炭黑
复合材料
滚动阻力
物理机械性能
动态力学性能
solution-polymerized butadiene-styrene rubber
natural rubber
silane coupling agent
silica
composite
rolling resistance
physial and mechanical property
dynamic mechanical pro-perty
