Abstract
The photo-oxidation of epoxy resins based on bisphenol A and cured by non-aromatic amines: diethylene triamine, aminoethyl piperazine and isophorone diamine results in carbonyl and amide formation, decrease of glass transition temperature, and the appearance of a new endotherm at 70–80°C in the DSC traces. The carbonyl and, essentially the amide yield depend strongly on the hardener structure and concentration. The mechanisms of formation of these groups are discussed.
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