The curing kinetics of epoxy resin/rubber blends containing different contents of epoxidized carboxyl-terminated butadiene acrylonitrile (ECTBN) with different epoxidation degrees is studied using non-isothermal differential scanning calorimetry (DSC) at different heating rate. Kissinger method is used to calculate the apparent activation energies, and Malek method is used to determine the most suitable kinetic model characterizing the curing process. The results show that the curing reaction is catalyzed by the hydroxyl and carboxyl groups in ECTBNs, whereas hindered by the viscosity increment owing to addition of rubber. Within the chemical reaction control stage, the curing process could be well described by the two-parameter autocatalytic kinetic model of Sestak-Berggren, and the simulated curves calculated bySestak-Berggren model show a good agreement with that experimentally determined. (C) 2015 Elsevier B.V. All rights reserved.