巯基-环氧反应作为一类典型的“点击化学”具有反应速度快、选择性高且反应条件温和等优点,近年来备受关注。本文首先阐述了巯基-环氧反应的碱催化机理,并评述了碱性催化剂、取代基团以及溶剂等因素对于巯基-环氧反应速率的影响。归纳认为,无机碱如氢氧化锂以及有机碱如四丁基氟化铵具有较高催化活性,并比较了无机碱和有机碱催化剂的优缺点;与供电子基团连接的巯基化合物以及与吸电子基团连接的环氧化合物具有较高的反应活性,位阻效应也对其有影响;在无溶剂的本体条件下反应活性较高。同时,重点介绍了巯基-环氧反应在高分子材料领域中应用的最新进展,并将其分为在溶剂中合成结构可控的高分子(包括线型或复杂结构高分子的合成和高分子或表面的修饰改性)以及本体条件下制备性能优良且具有应用价值的高分子网络两大类进行讨论。最后,简要展望了其发展前景。
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