两性纤维素接枝共聚物CGAD热降解行为的研究

Study on the thermal degradation of amphoteric cellulose graft copolymer CGAD

本文用热失重分析法研究了两性纤维素接枝共聚物CGAD的热分解特征，用三种不同方法进行实验得到了热降解反应的动力学参数，取得了比较—致的结果，时对接枝共聚物的热降解机理进行了初步探讨。

The amphoteric cellulose graft copolymer CGAD was synthesized by the graft)copolymerization of edurn carboxyrnthylcellulose with acrybode and dimethylammonioethyl methylacrylate4 The CGAD was characterized by IR, The thermal degradation of CGAD was detedrined by means of TGA. ItS TG curves show that the average rate of degradation decreases with increase of Sample weight, and the temperatures of 50% weight loss, the start of intense degradation, the mforurn peak of degradation are fugher with the increase of heating rate. On the other hand, the activatbo energy and kinetic order of the degradation were detendned by three methods. The results show the kinetic order is one and activation energies obtalned from three mehods are very close.