含氢硅油对加成型液体硅橡胶粘接性能的影响

Effects of hydrogen-containing silicone oil on the adhesion of addition-cure liquid silicone rubber

本文用乙烯基硅油为基料、含氢硅油为交联剂、白炭黑为补强剂、铂催化剂和抑制剂等制得双组分加成型液体硅橡胶。考察了含氢硅油中SiH与乙烯基硅油中SiCHCH2的摩尔比、不同含氢量相同粘度的含氢硅油以及不同粘度相同含氢量的含氢硅油对双组分加成型液体硅橡胶粘接性能的影响。结果表明：当n（SiH／SiCHCH2）在1—1．4和1．7—2．0时，加成型液体硅橡胶的粘接性能随着n的增加而提高；当含氢硅油的含氢量在0．2％～0．6％和0．9％～1．6％时，随着含氢量的增加，含氢硅油对加成型液体硅橡胶的粘接力起着较大作用；在本文的研究范围内，相同含氢量的含氢硅油当粘度在90～140mPa·s时，加成型液体硅橡胶的剪切强度最大，粘接性能最佳。

Two-part addition-cure liquid silicone rubber was prepared with organopolysiloxane containing alkenyl group as basic gum, hydrogen-containing silicone oil as erosslink agent, silica white as reinforcing agent and catalyzed by Pt catalyst. Aseries of mo- lar ratio of Sill group and vinyl group,different Sill content of hydrogen-containing silicone oil at the same viscosity, and different viscosity of hydrogen-containing silicone oil at the same Sill content were used to investigate the adhesion of silicone rubber. Result showed that the adhesion of silicone rubber become stronger when the value of n（ SiI-I/SiCHCH2 ）in the range of 1 to 1.4 and 1.7 to 2. 0. Hydrogen-containing silicone oil plays a greater role to the adhesion of silicone rubber when the hydrogen content of hydro- gen-containing silicone oil in the range of 0. 2% to 0. 6% and 0. 9% to 1.6%. In this paper, addition-cure liquid silicone rubber has maximum shear strength and best adhesive properties when the viscosity of hydrogen-containing silicone oil at 90～140mPa·s.