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采用α,ω-二羟基聚二甲基硅氧烷(107胶)、气相白炭黑、无机阻燃剂聚磷酸铵(APP)等制备了无机阻燃脱醇型单组分室温硫化(RTV-1)硅橡胶,研究了APP用量对脱醇型RTV-1硅橡胶阻燃、物理性能和贮存期的影响,以及APP阻燃脱醇型RTV-1硅橡胶的热稳定性。结果表明,当APP的用量达80份以上时,脱醇型RTV-1硅橡胶才具有阻燃性能。但随着APP用量的增加,脱醇型RTV-1硅橡胶的拉伸强度、扯断伸长率均逐渐下降;当加入80份APP时,脱醇型RTV-1硅橡胶贮存期为9个月以上,APP几乎不影响其贮存的性能。添加了80份APP的阻燃脱醇型RTV-1硅橡胶与未加APP的脱醇型RTV-1硅橡胶相比,初始分解温度下降。
The flame retardant and alcohol-free one-component RTV (RTV) was prepared by using α, ω-dihydroxy polydimethylsiloxane (107 gum), fumed silica and APP, -1) silicone rubber, the effects of APP dosage on the flame retardancy, physical properties and shelf life of alcohol-free RTV-1 silicone rubber and the thermal stability of APP flame retardant and alcohol-free RTV-1 silicone rubber were investigated. The results show that when the amount of APP is more than 80, the alcohol-free RTV-1 silicone rubber has flame retardant properties. But with the increase of APP dosage, the tensile strength and elongation at break of the alcohol-free RTV-1 silicone rubber decreased gradually. When 80 APPs were added, the alcohol-free RTV-1 silicone rubber had a shelf life of 9 Months, APP almost does not affect the performance of its storage. The initial decomposition temperature of the flame-retardant alcohol-free RTV-1 silicone rubber with 80 APP additions dropped compared with that of the APP-free alcohol-free RTV-1 silicone rubber.