粘度法测聚合物分子量的实验教学改革

Experimental Teaching Reform of Measuring the Molecular Weight of Polymer by Viscosity Method

粘度法是表征聚合物分子量的常用方法之一,具有操作方便、设备简单、实验精度高、分子量适用范围宽等优点,在工业生产和科学研究中得到了广泛应用。"粘度法测聚合物的分子量"是高分子物理实验中一个非常重要的实验项目。传统的粘度法教学实验通常只是孤立地测试聚合物的分子量,没有考虑其影响因素,实验内容单一,缺乏系统性。本文通过对该实验原有内容的设计扩充,将传统的验证性实验项目转变为综合性实验项目,使学生能更加深入地理解粘度法的原理及应用,激发了学生的学习热情,教学效果良好。

Viscosity method is one of the commonly used methods to characterize the molecular weight of polymer.It has the advantages of convenient operation,simple equipment,high experimental accuracy,wide range of molecular weight application,and it has been widely used in industrial production and scientific research.The experiment project of"Measuring the molecular weight of polymer by viscosity method"is an important item in the experiments of polymer physics.The traditional viscosity teaching experiment is only to determine the molecular weight of polymer separately without considering its influencing factors.The experiment content is single and lacks of systematicness.In this paper,the traditional confirmatory experimental item is transformed into comprehensive one through the design and expansion of the original experiment content.It is helpful for students to understand the principle and application of the viscosity method more deeply,understand the formation mechanism of different polymer crystalline forms more vividly,and stimulate their enthusiasm for learning,and have a good teaching results.