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 GLYCOL (cas 1638-16-0)s

Add time:07/30/2019    Source:sciencedirect.com

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.

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