改性针状硅酸盐补强SBR的机理研究

研究采用过氧化物硫化体系时几种硅烷偶联剂改性针状硅酸盐(FS)/SBR复合材料的物理性能，并详细探讨硅烷偶联剂改性FS补强SBR的机理。结果表明，采用过氧化物硫化体系，硅烷偶联剂KH-570改性FS补强SBR效果较好；硅烷偶联剂一端含有的烷氧基可以与FS表面的活泼羟基反应形成Si—O—Si，另一端含有的有机官能团可以与SBR大分子发生缠绕或反应，提高FS与SBR间的界面结合作用，同时改善FS在SBR基体中的分散性，因此硅烷偶联剂改性FS对SBR的补强性能优良。;The fibrillar silicates(FSs) were modified by several silane coupling agents respectively，the physical properties of these FSs/SBR composites with peroxide curing system were investigated and the mechanism of SBR reinforced by different modified FSs was discussed in detail.The results showed that the better physical properties of FS/SBR composite was obtained when FS was modified with silane coupling agent KH-570；and the alkoxyls on the end of silane coupling agent could react with the hydroxyls on the surface of FS to form Si—O—Si bond，meanwhile the organic functional group of silane coupling agent could entangle or react with the macromolecules of SBR to improve the interface bonding between FS and SBR and the dispersity of FS in SBR matrix