Abstract
Diglycidyl ether of bisphenol A (DGEBA) epoxy resin is cured by two typical diethylene triamine-derived curing agents which have a versamid structure (VDETA) and a butyl ether structure (BDETA) in their molecules respectively, and the exothermic curing kinetics of epoxy/amine is studied by non-isothermal, isothermal DSC and in-situ FT-IR methods. It is found that VDETA hardens epoxy resin more gently with little heat accumulation while BDETA leads to explosive increase of temperature caused by the exothermic reaction, and the dramatic temperature gradient heavily decreases homogeneity of mechanical properties. Kinetic studies reveal that VDETA containing acid amide structure is favorable to reduce the temperature and increase the homogeneity of the mechanical properties.
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