Artículos de revistas
Cure kinetics of diglycidylether of bisphenol A– ethylenediamine revisited using a mechanistic model
Riccardi, Carmen Cristina; Fraga, F.; Dupuy, J.; Williams, Roberto Juan Jose; Cure kinetics of diglycidylether of bisphenol A– ethylenediamine revisited using a mechanistic model; John Wiley & Sons Inc; Journal of Applied Polymer Science; 82; 9; 14-9-2001; 2319-2335
Riccardi, Carmen Cristina
Williams, Roberto Juan Jose
The polymerization kinetics of the reaction between diglycidylether of bisphenol A (DGEBA) and ethylenediamine (EDA) was analyzed, using dynamic scanning calorimetry, in both isothermal and programmed heating-rate modes. A simple mechanistic model, consisting of an equilibrium reaction generating an epoxy–hydroxyl complex, and including two possible mechanisms for the consumption of amine hydrogens [(1) with free epoxy groups, (2) with the epoxy–hydroxyl complex], provided a reasonable fitting of the whole set of experimental results. It was found that the equilibrium constant decreased with temperature, making less important the reaction mechanism involving the epoxy–hydroxyl complex.