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The research described here studied the curing kinetics of pure epoxy (EP), epoxy/phenolic resin (EP/PH) and epoxy/nano-CaCO 3  particles (EP/NPs) composites by isothermal differential scanning calorimetry (DSC). A model free technique (isoconversional technique) was used to study the curing reaction kinetics and the results showed that the activation energies (E a)  of the pure EP, EP/PH, and EP/NPs composites remained constant at different conversions. The research showed a decrease of E a  for the EP/NPs system, while there was a small increase of Ea for the EP/PH. This can be attributed to the acceleration effect of the nano-CaCO 3  for the EP/NPs system and the low reactivity of PH for the EP/PH system.

Effect of Phenolic Resin and Nano-Calcium Carbonate Particles on the Curing Kinetic of Epoxy Composites