苯基聚硅氧烷对加成型自渗油液体硅橡胶性能的影响

ffect of Phenyl Polysiloxane on Properties of Additional Cured Oil-Bleeding Liquid Silicone Rubber

以乙烯基硅油、含氢硅油、铂催化剂、苯基聚硅氧烷、炔基环己醇、气相法二氧化硅为原料,制得加成型自渗油液体硅橡胶,研究了苯基聚硅氧烷对其力学性能、流变行为、电绝缘性能、压缩永久变形、自渗油性能的影响。结果表明:苯基聚硅氧烷的加入会显著降低胶料的力学性能。当苯基聚硅氧烷的黏度达到500 mPa·s时,胶料的力学性能最差;苯基聚硅氧烷的引入还会显著影响胶料的压缩永久变形,当苯基聚硅氧烷黏度在260 mPa·s时,压缩永久变形基本保持恒定;随着苯基聚硅氧烷黏度的增加,胶料的储能模量和损耗模量均会出现规律性变化,自渗油时间逐渐延长;苯基聚硅氧烷对胶料电绝缘性能的影响不显著,胶料击穿强度稳定在22 kV/mm左右,体积电阻率稳定在1014Ω·cm左右。

The additional cured oil-bleeding liquid silicone rubber was prepared by vinyl silicone oil,hydrogen silicone oil,platinum catalyst,phenyl polysiloxane,alkynylcyclohexanol and fumed silica as raw materials.The effects of phenyl polysiloxane on its mechanical properties,rheological behavior,electrical properties,compression set and oil-bleeding properties were studied.The results show that phenyl polysiloxane can significantly reduce the mechanical properties of the compound.When the viscosity of phenyl polysiloxane reaches 500 mPa·s,the compound has the worst mechanical properties.The introduction of phenyl polysiloxane can also significantly affect the compression set of the compounds.When the viscosity of phenyl polysiloxane is 260 mPa·s,it has the stable compression set.With the increasing viscosity of phenyl polysiloxane,the storage modulus and loss modulus of the compound will change regularly,and the oil-bleeding time will gradually increase.The effect of phenyl polysiloxane has no significant effect on the electrical insulation properties of the compound.The breakdown strength of the compound is stable at about 22 kV/mm and the volume resistivity is stable at 1014Ω·cm.