摘要
以碱催化平衡聚合法制备的α,ω-二羟基聚二甲基硅氧烷为基胶制备脱醇型RTV-1阻燃硅橡胶,研究阻燃剂三聚氰胺聚磷酸盐(MPP)用量对脱醇型RTV-1硅橡胶阻燃性能、物理性能和热稳定性能的影响。结果表明:当阻燃剂MPP用量超过30份时,硅橡胶的阻燃性能达到美国ANSI/UL 94—2010标准V-0级。随着阻燃剂MPP用量的增大,硅橡胶的热释放速率峰值和烟气释放速率减小,邵尔A型硬度、拉伸强度和撕裂强度增大,拉断伸长率呈减小趋势。与未添加阻燃剂MPP的硅橡胶相比,阻燃剂MPP填充硅橡胶的初始分解温度下降。
The flame retardant RTV-1 silicone rubber was prepared by using a, ω-dihydroxyl polydimethylsiloxane,which was prepared by equilibrium polymerization with alkali catalyst, and the influence of the addition level of flame retardant MPP on the flame retardant properties,physical properties and thermal stability of dealcoholized silicone rubber was investigated. The results showed that,as the addition level of MPP was over 30 phr,the flammability test showed that the silicone rubber reached V-0 rating of ANSI/UL 94-2010. As the addition level of MPP increased,the peak of heat releasing rate and smoke releasing rate of silicone rubber decreased, the Shore A hardness, tensile strength and tear strength increased, and the elongation at break decreased. The initial decomposition temperature of the silicone rubber decreased when the flame retardant MPP was used.
出处
《橡胶工业》
CAS
北大核心
2013年第1期20-24,共5页
China Rubber Industry
关键词
硅橡胶
阻燃性能
物理性能
热稳定性
silicone rubber
flame retardancy
physical property
thermal stability
