加成型高温硫化液体硅橡胶的气泡消除及性能研究  

Study on Air Bubble Elimination and Properties of Addition Crosslinking HTV Liquid Silicone Rubber

作　　者：唐龙祥[1] 程明星[1] 刘春华[1] 翟松涛[1] 

机构地区：[1]合肥工业大学化学与化工学院,安徽合肥230009

出　　处：《橡胶工业》2015年第11期674-678,共5页China Rubber Industry

摘　　要：研究交联剂、催化剂和消泡剂对加成型高温硫化液体硅橡胶的固化时间、电绝缘性能和物理性能的影响。结果表明:随着交联剂或催化剂用量的增大,硅橡胶的固化时间缩短,电阻率先减小后增大,邵尔A型硬度变化不大,拉伸强度先增大后减小,硅橡胶内部的泡孔增多;使用消泡剂可有效抑制硅橡胶中气泡的产生;当交联剂用量为0.95份、催化剂用量为1.05份、聚氧乙烯聚氧丙烯季戊四醇醚质量分数为0.004时,硅橡胶的综合性能最佳。The effects of crosslinking agent,catalyst and defoamer on the curing time,electric insulation and physical properties of addition crosslinking HTV liquid silicone rubber were investigated.The results showed that,as the addition level of crosslinking agent or catalyst increased,the curing time of silicone rubber was shortened,the resistivity decreased at first and then increased,Shore A hardness changed little,tensile strength increased at first and then decreased,and the amount of bubble in silicone rubber increased.Defoamer could effectively inhibit the formation of bubble in silicone rubber.The properties of silicone rubber were optimized when the addition level of crosslinking agent and catalyst was 0.95 and 1.05 phr respectively,and the mass fraction of pentaerythritol polyoxyethylene polyoxypropylene ether.

关 键 词：高温硫化硅橡胶 气泡 物理性能 电阻率 

分 类 号：TQ333.93[化学工程—橡胶工业]