链式共聚反应的新分类方法

Discussion on the Innovative Classification of Chain Copolymerization

在二元链式共聚反应中,竞聚率r1,r2可以在很大范围内变化,相应F1-f1关系曲线也有多种类型。教科书中常常首先按照r1与r2的乘积(r1·r2)与1的大小关系比较进行分类,这样的分类法缺乏直观性,对初学者而言较难理解。本文直接按照r1与r2本身数值的大小提供一种更加基础的分类法,并按照相应体系分类讨论,以期对共聚反应的教学以及相关研究起到参考作用。

In copolymerization reaction of two monomers, reactivity ratios r1 and r2 may vary in a wide range. Thus, correspondingto the different values, there are diverse kinds of the F1--flcurves. In most textbooks, the first step of the classification process is to compare the product of rl and rz （rl · r2） with the value 1. However, this indirect classification method might be opaque to some beginners. This article will provide a novel and fundamental strategy directly based on rl and r2 value per se, followed by the discussion of diverse systems. We hope the classification could be helpful to polymer chemistry education as well as the frontier research.