期刊
THERMOCHIMICA ACTA
卷 543, 期 -, 页码 281-287出版社
ELSEVIER
DOI: 10.1016/j.tca.2012.06.009
关键词
Thermal stability; Degradation; Kinetic; Polyurethanes; Pyridine
资金
- Natural Science Foundation of China [50803037, 21104045, 51173109]
- Natural Science Foundation of SZU [201101]
- Shenzhen Key Laboratory of Special Functional Materials [T-201102]
Recently, pyridine containing polyurethanes (PUPys) are attractive to fabricate supramolecular polymer networks. In this paper, thermogravimetric analysis was used to investigate thermal stability of PUPys quantitatively. The results show that the PUPys have at least two stages of degradation. The thermal stability of PUPys is better under oxygen as compared with nitrogen. PUPys based on hexamethylene isocyanate tends to have higher onset decomposition temperature, but lower end decomposition temperature as compared with PUPys based on diphenylmethane diisocyanate (MDI). The PUPys with lower pyridine unit content have improved thermal stability at lower temperature range. The addition of rigid hard segment improves the decomposition temperature of pyridine unit, but promotes the weight loss at higher temperature range. Finally, it is proposed that the thermo-oxidative degradation of PUPys might be explained with the association of pyridine ring with hydrogen atom or hydroperoxides. (C) 2012 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据