The thermal degradation of PET and analogous polyesters measured by thermal analysis-fourier transform infrared spectroscopy
The thermal degradation of PET and analogous polyesters measured by thermal analysis-fourier transform infrared spectroscopy
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DOI：
10.1016/s0032-3861(01)00775-3
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发表时间：
2002-03-01
期刊：
影响因子：
4.6
通讯作者：
Hay, JN
中科院分区：
文献类型：
--
作者：
Holland, BJ;Hay, JN
采用热重法和热分析-傅里叶变换红外光谱法研究了两种市售聚对苯二甲酸乙二酯（PET）和两种实验室制备的聚酯（聚对苯二甲酸乙二醇酯和聚对苯二甲酸二乙二醇酯）的热降解过程。将商品PET样品与二甘醇和辛酸基团以不同比例共聚，发现它们的热稳定性不同。通过对聚对苯二甲酸二乙二醇酯和聚对苯二甲酸乙二醇酯的热降解研究，发现二乙二醇和对苯二甲酸乙二醇酯单元分别通过增加链柔性和更有利的键角来促进热降解。所有测试的聚酯的热降解导致形成非挥发性残留物。红外光谱分析表明，残留物几乎完全由相互连接的芳环组成。(C)2002爱思唯尔科技有限公司版权所有。
The thermal degradation of two commercial poly(ethylene terephthalate) (PET) samples and two laboratory prepared polyesters, poly(ethylene isophthalate) and poly(diethylene glycol terephthalate), was studied using thermogravimetry and thermal analysis-Fourier transform infrared spectroscopy. The commercial PET samples were copolymerised with diethylene glycol and isophthalic acid groups in different proportions, and their thermal stabilities were found to differ. Through a study of the thermal degradation of poly(diethylene glycol terephthalate) and poly(ethylene isophthalate), it was found that diethylene glycol and isophthalate units promoted thermal degradation through increased chain flexibility and more favourable bond angles, respectively. The thermal degradation of all the polyesters tested lead to the formation of non-volatile residue. Infrared spectroscopic analysis indicated that the residue consisted almost exclusively of interconnected aromatic rings. (C) 2002 Elsevier Science Ltd. All rights reserved.