Degradation of epoxy polymers: Part 1—Products of thermal degradation of bisphenol-A diglycidyl ether |
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Authors: | Norman Grassie Marilyn I Guy Norman H Tennent |
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Institution: | Department of Chemistry, University of Glasgow, Glasgow G12 8QQ, Scotland, Great Britain;Glasgow Museums and Art Galleries, Kelvingrove, Glasgow G3 8AG, Scotland, Great Britain |
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Abstract: | The principal characteristics and products of thermal degradation of a commercial epoxy resin prepared by reaction of 2,2-bis(4′-hydroxy phenyl)propane (bisphenol-A) with 1-chloro-2,3-epoxy propane (epichlorhydrin) have been studied. The principal volatile products, acrolein, acetone and allyl alcohol, are formed at 280°C and, although cross-linking is detectable at 220°C, it only becomes significant at 320°C when the residual resin is brittle and insoluble. Decomposition of the cross-linked resin occurs above 340°C when phenolic compounds appear together with more complex products with higher molecular weights whose structures have been speculated upon from examination of their mass spectral characteristics. |
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