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一、序言含氟塑料和橡胶如:聚四氟乙烯,聚三氟氯乙烯,聚一氟乙烯,聚偏二氟乙烯,以及含氟弹性体等,都是由相应含氟烯烃通过自由基引发的聚合或共聚得到的。利用自由基型的调聚反应,则可合成“氟油”及“调聚酸”等产品。聚合、共聚或调聚的共同基本过程是自由基型的加成反应。因此含氟烯类的自由基加成反应不仅有着广泛地实用价值,并且在理论方面也有其重要意义。特别是加成中的定位方向问题,引起了人们的极大兴趣。1954年Cadogan和Hcy曾总结过烯类体系的自由基型加成反应。近年来,这方面的工作又有了补充和发展。本文即依据近年来有关含氟烯类的研究工作和成就,概括的作一综述性报导。并侧重讨论定位问题。
I. Introduction Fluorinated plastics and rubbers such as polytetrafluoroethylene, polychlorotrifluoroethylene, polyvinylidene fluoride, polyvinylidene fluoride, and fluoroelastomers are all derived from the corresponding fluoroolefins by free radical initiation Obtained by polymerization or copolymerization. The use of radical-based telomerization reaction, you can synthesize “fluorine oil” and “transfer poly acid” and other products. The common basic process of polymerization, copolymerization or telomerization is the radical-type addition reaction. Therefore, fluorine-containing vinyl radical addition reaction not only has a wide range of practical value, and in theory also has its significance. In particular, the positioning of the addition of the problem, has aroused great interest. Cadogan and Hcy in 1954 have summarized the free radical-type addition reaction of olefinic systems. In recent years, the work in this area has been supplemented and developed. This article is based on recent years on fluorine-containing olefins research work and achievements, a summary for a summary report. And focus on positioning issues.