Blends of a new thermoplastic in a thermoset epoxy matrix |
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Authors: | François Constantin Françoise Fenouillot Jean-Luc Guillaume Raymond Koenig Jean-Pierre Pascault |
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Affiliation: | 1. Laboratoire des Matériaux Macromoléculaires, IMP UMR 5627 CNRS, Institut National des Sciences Appliquées de Lyon, 69621 Villeurbanne Cedex, France;2. Epoxy Business, DOW Chemicals Research Center, Rheinmünster, Germany |
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Abstract: | Properties of thermoplastic modified epoxy network have been studied. The particularity of this work is the use of new thermoplastic epoxies whose structure is close to the final matrix. Blends of thermoset epoxy (Diglycidyl Ether of Bisphenol A/4-4′ methylenebis [3-chloro 2,6-diethylaniline]) with a thermoplastic content from 5 to 40%w have been realised. Initial miscibility in the thermoset precursors shows an UCST behaviour with a maximal value near 130°C for a thermoplastic content of 10%. Due to the presence of tertiary amine and pendant hydroxyl groups on the thermoplastic backbone, epoxy amine reactions are faster than for the neat system but the thermoplastic seems not to have reacted with the thermoset network. The final blends are transparent but toughening increase is rather low. |
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Keywords: | blends kinetic miscibility thermoplastic epoxy toughness |
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