本文研究了不同分子量的甲基乙烯基硅橡胶的辐射交联,发现G交值与重均分子量的倒数成线性关系,其它各交联参数值均与重均分子量成线性关系。分子量大,交联反应快。而不同分子量的聚醚丙烯酸甲苯二异氰酸酯等齐聚物的辐射交联,分子量大,交联反应慢。本文还比较了不同二异氰酸酯的齐聚物的交联活性,含下列结构的齐聚物活性次序为HDI>TDI>MDI。 In this paper, the radiation cross-linking of methyl vinyl silicone rubber with different molecular weights was studied. It was found that the value of G was linear with the reciprocal of weight average molecular weight. The other cross-linking parameters were linear with the weight average molecular weight. Large molecular weight, fast cross-linking reaction. The different molecular weight of polyether acrylate toluene diisocyanate and other oligomers cross-linked radiation, high molecular weight, cross-linking reaction slow. In this paper, we also compare the cross-linking activity of oligomers with different diisocyanates. The order of the oligomers with the following structure is HDI> TDI> MDI.