Advanced integral isoconversional analysis for evaluating and predicting the kinetic parameters of the curing reaction of epoxy prepreg

The effect of a renewable fatty acid derivatives based epoxy diluent on the curing kinetics and thermal properties of epoxy/anhydride systems

“…This method is one of model-free isoconversional methods, which abides by the isoconversional principle that the reaction rate is only a function of the temperature at a constant conversion. The relationship between E a and a can be constructed by this method without assuming any certain kinetic model [32][33][34]. The main analytic equations for this method in a non-isothermal curing process with a linear heating program can be expressed as follows:…”

Development of an optimized thermal cure cycle for a complex-shape composite part using a coupled finite element/genetic algorithm technique

“…(3). The reason for this similarity is that the kinetic parameters of two models were calculated using non-isothermal experimental DSC data with heating rates ranging between 2.5 and 5 °C min −1 [25]. This range is very close to the range of −3 °C min −1 (C min ) to +5 °C min −1 (H max ) which are, respectively, lower point and upper point for the technical limitations of the heating/cooling system.…”

“…We have previously shown [25] that the prediction capability of the model-free method is better than that of the Figure 13 shows temperature simulation results calculated using Eq. (4) in the surface and center for the thickest section of the part.…”

“…4) was also used to investigate the influence of kinetic model on the simulation results. It was demonstrated that [25] the model-free method was able to predict both isothermal and non-isothermal experiments outside the experimental temperature regions, whereas the model fitting method could not do it. In general, this capability has direct effect on the heat generation term which appears in Eq.…”

“…It is pertinent to mention here that in our earlier publication [25] we obtained the kinetic parameters of the prepreg using both model-free and model fitting methods. In model fitting method, the Kamal and Sourour's model was used as the kinetic model and its kinetic parameters were calculated by a nonlinear four-parameter minimization procedure using genetic algorithm.…”