Abstract
This paper reports a study of self-healing epoxy composites. The healing agent was a two-component one synthesized in the authors laboratory, which consisted of epoxy-loaded urea-formaldehyde microcapsules as the polymerizable binder and CuBr2(2-MeIm)4 (the complex of CuBr2 and 2-methylimidazole) as the latent hardener. Both the microcapsules and the matching catalyst were pre-embedded and pre-dissolved in the composites matrix cured by 2-ethyl-4-methylimidazole (2E4MIm), respectively. The data of curing kinetics show that the latent hardener CuBr2(2-MeIm)4 is not affected during the curing process of 2 h at 80°C, 2 h at 120°C and 2 h at 140°C, and heat deformation temperature of composites consisting of 2 wt% CuBr2(2-MeIm)4 and 5 wt% mcirocapsules cured at the same curing process is 180.2°C.
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