Stabilisation of polyethylene and polypropylene glycol through inhibition of a β-positioned hydroxyl group relative to an ether group. A study of modified triethylene and tripropylene glycols
- 作者：Glastrup ; Jens
- 关键词：Polyethylene glycol ; Polypropylene glycol ; Stabilisation ; Degradation ; Oxidation ; Gas chromatography ; Mass spectrometry ; Waterlogged wood
- 刊名：Polymer Degradation and Stability
- 出版年：2003
- 期刊代码：85_01413910
- 类别：ms
- 出版时间：2003
- 卷：81
- 期：2
- 页码：273-278
- 文件大小：160 K
摘要
Polyethers are subject to oxidative degradation. An examination of the possible degradation mechanisms suggests a protective substitution, which has been shown to be effective on short chain polyglycols. Inserting a methylene group at the end of triethylene and tripropylene glycols, between the hydroxyl and ether groups, has a stabilising effect on their degradation in air. At 70 °C, degradation is completely stopped in modified triethylene glycol, while modified tripropylene glycol shows diminished degradation.