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本文合成了几种分子量相近,但乙烯基含量不同的甲基乙烯基硅橡胶。研究了辐照过程中溶胶分数与剂量之间关系。从实验上证实,在0—100kGy剂量范围内,交联度q与剂量关系为q=q_0R,但裂解度α与剂量成α=α_i+α＇。R~β关系。二甲基硅橡胶β=0.53,对各种乙烯基含量的硅橡胶β=0.44—0.54,R(S+S~(1/2))～R~β有很好线性关系。辐射交联时,从乙烯基含量与G值关系,乙烯基含量％(G值):0％(2.93),0.1％(5.14),0.20％(5.20)及0.435％(5.94),可知乙烯基的内强化效应明显。但从化学法交联效率来看,乙烯基含量％(交联效率f值):0％(0.068),0.1％(1.218),0.2％(1.983)及0.435％(3.372),可知在化学法交联过程中乙烯基内强化效应更明显。
This paper synthesized several similar molecular weight, but different vinyl content of methyl vinyl silicone rubber. The relationship between the sol fraction and dose during irradiation was studied. It has been experimentally confirmed that the relationship between the degree of crosslinking q and the dose is q = q_0R within the dose range of 0-100 kGy, but the degree of cracking α and the dose α = α_i + α ’. R ~ β relationship. Dimethyl silicone rubber β = 0.53, for a variety of vinyl content of the silicone rubber β = 0.44-0.54, R (S + S ~ (1/2)) ~ R ~ β has a good linear relationship. In the case of radiation cross-linking, it was found that the vinyl content (G value) was 0% (2.93), 0.1% (5.14), 0.20% (5.20) and 0.435% The internal strengthening effect is obvious. However, the vinyl content% (crosslinking efficiency f-value) is 0% (0.068), 0.1% (1.218), 0.2% (1.983) and 0.435% (3.372) During the crosslinking process, the strengthening effect of vinyl is more obvious.