采用导热无机填料氧化铝对甲基乙烯基硅橡胶进行改性,并采用电子束辐射交联硅橡胶,对辐射交联硅橡胶的力学性能及导热性能进行了研究.结果表明,随着辐射剂量的增加,硅橡胶的交联密度增大,拉伸断裂强度逐渐增加,当辐射剂量为30kGy时,强度出现极大值;断裂伸长率则随着辐射剂量的增加而逐渐下降.随着白炭黑含量的增加,硅橡胶的拉伸断裂强度及断裂伸长率均逐渐增加.导热无机填料氧化铝的加入能够有效地提高硅橡胶的导热率.随着氧化铝含量的增加,硅橡胶的导热系数逐渐增大,共混体系的拉伸断裂强度和断裂伸长率下降,硬度增加.
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