关于高分子化学缩聚反应中容易混淆的一些问题

Discusstion about Some Confusable Question in Condensation Polymerization

《高分子化学》是高分子材料等专业的必修课程,主要以聚合反应机理及反应动力学为主线,以连锁聚合和逐步聚合为两大主要板块。在逐步聚合部分主要以缩聚反应为例讲授逐步聚合特征及一般规律。笔者在缩聚反应部分内容教授的过程中发现了一些学生容易混淆的问题,如缩聚反应中平均聚合度与反应程度定义式中的N与N0、线形缩聚反应与体型缩聚反应体系中的反应程度、缩聚反应公式Xn=k′[A]0t+1中的浓度问题。本文针对教学中的这些问题进行了讨论,介绍了笔者的理解和相关的教学体会,希望利于学生的自学和其他教师的教学。

'Polymer Chemistry'course is the required course for the most materials type specialy.This course aims to that the principle of the polymer synthesis and kinetics of polymerization.It includes two main contents:step polymerization and chain polymerization.The basic principle and characters of the step polymerization are described by used the polycondensation as an exemple.In allusion to the some confusable question in the polycondensation,such as the meaning for N0 and Nin definition of extent of reaction and average polymerization degree,the extent of reaction in the linear polycondensation and crosslinking polycondensation,the concentration in equation Xn = k′ [A]0t + 1in the polycondensation reaction,the own comprehension and teaching realization were introduced.We hope that it could be referred by the students and other teachers.