Novel nitrogen‐containing epoxy resin. II. Cure kinetics by differential scanning calorimetry

Abstract

Abstract The isothermal and nonisothermal cure behaviors of a novel nitrogen‐containing epoxy resin (XT resin) were studied by differential scanning calorimetry (DSC). Various kinetic parameters and details of cure process were obtained based on the Avrami theory. The results indicated that Avrami method is suitable for calculating the kinetic parameters up to the gel point at least. The apparent activation energy ( E a ) for isothermal cure process was in agreement with that for nonisothermal cure process. E a value in the early stage (78.5–81.0 KJ mol −1 ) was about three times than that in the later stage (23.3–26.5 KJ mol −1 ). The kinetic results from Avrami theory may present a combined effect of all factors, and which is helpful to understand the cure technique for XT–DDS system. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 100: 3483–3489, 2006