六、环氧化环氧化是不饱和聚合物另一种类型的改性反应。多种过氧化合物和高酸类化合物已被用于实现这种转化过程[反应(45)](表Ⅵ和表Ⅴ)。由于新结合的环氧基的诱导效应,环氧化速率随转化过程而降低。这种速率延迟对于聚异戊二烯的模型化合物三十碳烯来说也已被观察到。此外,核磁共振研究证实环氧基分布的均匀性,并对缺乏链降解已有报导。聚丁二烯环氧化 Epoxidation Epoxidation is another type of unsaturated polymer modified reaction. A variety of peroxygen compounds and high acid compounds have been used to effect this conversion [reaction (45)] (Table VI and Table V). The epoxidation rate decreases with the conversion process due to the induction effect of newly bound epoxy groups. This rate delay has also been observed for the model compound, triaccene, of polyisoprene. In addition, nuclear magnetic resonance studies confirm the uniformity of epoxy distribution and have reported lack of chain degradation. Polybutadiene epoxidation