The reticulation process of an epoxy resin using an amine as a cure agent was studied at different temperatures and concentrations of the cure agent with dynamic mechanical thermal analysis. The study was performed under both isothermal and nonisothermal conditions, and a temperature-time-transformation diagram was obtained. The measurements from the two modes gave similar results, although the nonisothermal mode required fewer experiments. (C) 2003 Wiley Periodicals, Inc.