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Analysis of the reaction mechanism of the thiol–epoxy addition initiated by nucleophilic tertiary amines

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Abstract

A kinetic model for thiol–epoxy crosslinking initiated by tertiary amines has been proposed. The kinetic model is based on mechanistic considerations and it features the effect of the initiator, hydroxyl content, and thiol–epoxy ratios. The results of the kinetic model have been compared with data from the curing of off-stoichiometric formulations of diglycidyl ether of bisphenol A (DGEBA) crosslinked with trimethylolpropane tris(3-mercaptopropionate) (S3) using 1-methylimidazole (1MI) as the initiator. The model has been validated by fitting the kinetic parameters to the experimental data under a variety of reaction conditions. In spite of the experimental uncertainty and model assumptions, the main features of the curing kinetics are correctly described and the reaction rates are quantitatively reproduced.

Graphical abstract: Analysis of the reaction mechanism of the thiol–epoxy addition initiated by nucleophilic tertiary amines

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Publication details

The article was received on 27 Jul 2017, accepted on 25 Aug 2017 and first published on 30 Aug 2017


Article type: Paper
DOI: 10.1039/C7PY01263B
Citation: Polym. Chem., 2017, Advance Article
  • Open access: Creative Commons BY license
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    Analysis of the reaction mechanism of the thiol–epoxy addition initiated by nucleophilic tertiary amines

    A. O. Konuray, X. Fernández-Francos and X. Ramis, Polym. Chem., 2017, Advance Article , DOI: 10.1039/C7PY01263B

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