通过热重-傅里叶变换红外光谱法研究聚（3-羟基丁酸酯）和聚（3-羟基丁酸酯-co-3-羟基己酸酯）在氮气和氧气中的热降解。

Thermal degradation of poly(3-hydroxybutyrate) and poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) in nitrogen and oxygen studied by thermogravimetric-Fourier transform infrared spectroscopy.

作者信息

Vogel Christian, Morita Shigeaki, Sato Harumi, Noda Isao, Ozaki Yukihiro, Siesler Heinz W

机构信息

Department of Physical Chemistry, University of Duisburg-Essen, Schuetzenbahn 70, 45117 Essen, Germany.

出版信息

Appl Spectrosc. 2007 Jul;61(7):755-64. doi: 10.1366/000370207781393370.

DOI:10.1366/000370207781393370

PMID:17697470

Abstract

The thermal degradation behavior of poly(3-hydroxybutyrate) (PHB) and poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (P(HB-co-HHx), HHx=12 mol%) has been studied under different environmental conditions by thermogravimetric analysis (TGA) Fourier transform infrared (FT-IR) spectroscopy. It is reported that at higher temperature (>400 degrees C) carbon dioxide and propene are formed from the decomposition product crotonic acid in a nitrogen atmosphere, whereas in an oxygen atmosphere propene oxidizes in a further step to carbon dioxide, carbon monoxide and hydrogen. It was also found that PHB and P(HB-co-HHx) have a similar thermal degradation mechanism. The analysis of the FT-IR-spectroscopic data was performed with 2D and perturbation-correlation moving-window 2D (PCMW2D) correlation spectroscopy.

摘要

通过热重分析（TGA）和傅里叶变换红外（FT-IR）光谱法，研究了聚（3-羟基丁酸酯）（PHB）和聚（3-羟基丁酸酯-co-3-羟基己酸酯）（P（HB-co-HHx），HHx = 12 mol%）在不同环境条件下的热降解行为。据报道，在较高温度（>400℃）下，在氮气气氛中，分解产物巴豆酸会生成二氧化碳和丙烯，而在氧气气氛中，丙烯会进一步氧化生成二氧化碳、一氧化碳和氢气。还发现PHB和P（HB-co-HHx）具有相似的热降解机理。利用二维和扰动相关移动窗口二维（PCMW2D）相关光谱对FT-IR光谱数据进行了分析。