Prediction of the glass transition temperatures for epoxy resins and blends using group interaction modelling

Application of modem simulation methods for the prediction of the engineeri ng properties of polymeric materials may be a substitute for more time cons uming experiments. The principles of molecular modelling have been combined with group interaction modelling (GIM) for the prediction of properties of thermoset resins. The glass transition temperature of the systems was pred icted from the chemical structure of the resins and the effect of different hardeners on T-g was assessed. Different chemical reaction mechanisms whic h occur during resin cure were incorporated into the model for better predi ctions. A new set of expanded GIM equations include one for determination o f model input parameters from the conventional modelling principles for the estimate of T-g. Differential scanning calorimetry (DSC) and dynamic mecha nical thermal analysis (DMTA) experimental values of degree of cure and gla ss transition temperature were used to provide comparative analysis for the computations. (C) 2001 Elsevier Science Ltd. All rights reserved.