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人们在对聚二烯烃类化合物进行研究的过程中,发现当对这些化合物加热、辐照γ射线或用化学方法处理时,它们在交联的同时,总伴随着大分子的降解和环化过程.为此Raven、Okamoto和Golub等曾提出三种不同的机理进行解释.本文用IR、NMR和化学分析等方法,证明了二苯甲酮敏化的3,4-聚异戊二烯的光交联反应并不伴随着环化过程;光照前后二苯甲酮敏化的3,4-聚异戊二烯的GPC测定也证实了其分子量分布并未发生变化.因此该体系的光交联是一个非环化、非降解反应.
People in the process of polydiene research, found that when these compounds are heated, γ-ray irradiation or chemical treatment, they are at the same time cross-linked, always accompanied by macromolecular degradation and cyclization process To this end, Raven, Okamoto and Golub have proposed three different mechanisms to explain.This paper by IR, NMR and chemical analysis methods to prove the benzophenone sensitized 3,4-polyisoprene light The cross-linking reaction was not accompanied by the cyclization process; GPC analysis of benzophenone-sensitized 3,4-polyisoprene also confirmed that its molecular weight distribution did not change before and after irradiation. Is a non-cyclized, non-degradable reaction.