Material Science

CLC number: O232;O193

Preparation and Properties of Conductive Foamed Silicone Rubber

¹ School of Materials Science and Engineering, Hubei University, Wuhan 430062, Hubei, China
² School of Power & Mechanical Engineering, Wuhan University, Wuhan 430072, Hubei, China

^† To whom correspondence should be addressed. E-mail: zhangqc1976@hubu. edu.cn;
huangronghua@whu.edu.cn

Received: 16 August 2021

Abstract

The conductive foamed silicone rubber was prepared by Polymethylvinylsiloxane (PMVS) mixed with acetylene black, fumed silica, and AC foaming agent (azodicarbonamide). Influences of fillers on the microstructure, electrical conductivity and mechanical property were discussed. The results showed that the pore structure was affected by acetylene black. Acetylene black delayed the vulcanization speed of silicone rubbers, leading to bigger pores. Higher content of acetylene black decreased the mechanical properties and the electrical resistivity of rubbers. Fumed silica increased the mechanical properties and limited the aggregation of gas. Higher content of fumed silica led to small and obturator pores generated. Higher content of fumed silica increase the mechanical properties and the electrical resistivity of rubbers. AC foaming agents generated more gas, leading to bigger and irregular pores which affected the mechanical properties negatively, meanwhile AC foaming agents increased the conductivity of rubbers.