摘要
采用交联密度法探讨了硅烷偶联剂对SiO2增强端羟基苯基硅橡胶的作用机理及高低温性能的影响。对室温硫化硅橡胶的力学性能、交联密度、热性能等进行了测试,测试结果表明:当γ-氨丙基三乙氧基硅烷(KH550)用量为6份时,室温硫化硅橡胶的化学交联密度比例最大,力学性能最优,SiO2与硅橡胶的界面性能最好;硅橡胶交联体系中物理交联比例的减小导致玻璃化转变温度降低,硅橡胶的耐低温性能改善;化学交联密度比例增加,硅橡胶的耐热性提高。
The cross-linking density method was used to investigate the effects of a coupling agent on the mechani- cal properties and the high and low temperature performance of silica-enhanced hydroxyl-terminated phenylsiloxane rubber. Mechanical properties, SEM, cross-linking density, DSC, DMA, and TGA analysis all showed that the chemical cross-linking density ratio was the greatest when the mass fraction of T-aminopropyltriethoxysilane （KH550） was 6 parts per hundreds of hydroxyl-terminated phenylsiloxane rubber, which resulted in room temperature vulcanized silicone rubber with the highest tensile properties, as well as the optimum interface adhesion between silica and the silicone rubber. Meanwhile, the lower glass transition temperature, which resulted from the decrease in the physical cross-linking density ratio, indicated the improvement of the low temperature resistance of the silicone rubber. The increase in the chemical cross-linking density ratio showed that the heat resistance of RTV silicone rubber was improved.
出处
《北京化工大学学报（自然科学版）》
CAS
CSCD
北大核心
2013年第2期37-43,共7页
Journal of Beijing University of Chemical Technology(Natural Science Edition)
关键词
端羟基苯基硅橡胶
硅烷偶联剂
二氧化硅
平衡溶胀法
机理
hydroxyl-terminated phenyl siloxane rubber
silane coupling agent
silica
equilibrium swelling method
mechanism
