以炭黑为导电功能填料制备炭黑/甲基乙烯基硅橡胶(MVQ)力敏复合材料,研究炭黑用量对复合材料硫化特性、拉伸性能、压缩应力松弛性能、电性能和压阻性能的影响.结果表明:炭黑用量为11～16份时,炭黑/MVQ复合材料电性能达到逾渗阈值.随着炭黑用量的增大,炭黑/MVQ复合材料拉伸强度先增大后减小,最后趋于稳定,而压缩松弛率呈减小趋势.炭黑用量为11份时炭黑/MVQ复合材料的压阻重复性较好.适宜的炭黑用量为10～12份.%Using carbon black as conductive functional filler,the carbon black/MVQ force-sensitive composite was prepared, and the effects of addition level of carbon black on curing behavior, tensile property .compression stress relaxation, electrical conductivity and pressure resistance were investigated. The results showed that, when the addition level of carbon black was 11 ~ 16 phr,the electrical conductivity of composite reached percolation threshold. As the addition level of carbon black increased, the tensile strength of composite increased at first,then decreased,and finally kept stable,the compression relaxation rate tended to decrease. The repeatability of pressure resistance was better when the addition level of carbon black was 11 phr. Therefore, the proper addition level of carbon black was 10-12 phr.
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