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Chemical degradation of polyurethanes: Degradation of flexible polyester polyurethane foam by phosphonic acid dialkyl esters |
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| Authors: | K. Troev A. Tsekova R. Tsevi |
| Abstract: | Flexible polyurethane foam based on toluene diisocyanate and polyester polyol has been liquefied by treatment with either dimethyl phosphonate (CH3O)2P(O)H or diethyl phosphonate (C2H5O)2P(O)H at 160°C. The product degraded has been studies by 1H, 13C, and 31P nuclear magnetic resonance (NMR) spectroscopy. The likely reaction mechanism is presented. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 78: 2565–2573, 2000 |
| Keywords: | chemical recycling flexible polyester polyurethane foam chemical degradation dimethyl phosphonate diethyl phosphonate |