四川大学学报（自然科学版）Issue(1)：134-138,5.DOI:10.3969/j.issn.0490-6756.2015.01.024
氟醚橡胶热分解规律及动力学研究
Characteristics and kinetics of thermal degradation of fluoroether rubber
何利万 1皮红 1丁祖群 2侯平安2
作者信息
- 1. 四川大学高分子研究所高分子材料工程国家重点实验室，成都 610065
- 2. 成都飞机工业集团有限公司，成都 610092
- 折叠
摘要
Abstract
The thermal decomposition characteristics and kinetics of fluoroether rubber were studied by thermogravimetric technique under pure nitrogen atmosphere.The results suggest that all samples with heating rate from 5K/min to 20K/min show a similar characteristic in their TGA curves,two steps take place in their decomposition processes.And as the heating rate increasing,the degradation temperature of the sample moves to be higher.The method of equal conversion rate (Friedman method)was used to determinate the apparent activity energy at different conversion rates,it is found that the average value of the activity energy is 241.4 kJ/mol.Coats-Redfern method was used to discuss the probable degrada-tion mechanism at different heating rate,it indicates that the thermal degradation mechanism of flu-oroether rubber at different heating rates is the same.Combining the two methods,it can be concluded that the most reasonable thermal degradation mechanism of fluoroether rubber is Mampel power law:g (α)=α3/2 ,and the apparent activity energy is 244.3 kJ/mol.关键词
氟醚橡胶/热失重分析/热分解/动力学Key words
Fluoroether Rubber/TGA/Thermal Degradation/Kinetics分类
生物科学引用本文复制引用
何利万,皮红,丁祖群,侯平安..氟醚橡胶热分解规律及动力学研究[J].四川大学学报（自然科学版）,2015,(1):134-138,5.
