Abstract
A thermo-kinetic model was employed to study the temperature and curing degree distribution in a casting part of a DGEBA–DDM system during its curing process in an oven. Initially, the curing of the DGEBA–DDM casting part system was investigated by isothermal and non-isothermal differential scanning calorimetry. A Kamal and Sourour phenomenological model expanded by a diffusion factor was proposed for modeling the curing. The proposed model fit properly the curing behavior of this system in the analyzed range of temperatures. This model enables the application within finite element analysis software for modeling the curing process of real thermosetting parts. Finite element-based program COMSOL Multiphysics™ was used to simulate the curing process. The model fits properly the initial heating of the sample until the reaction temperature, the time position at which the temperature starts to increase due to the heat generated during epoxy–amine reaction and also the rate at which the temperature increases, but it overestimates the maximum temperatures reached in the system. Nevertheless, the proposed model is shown as a powerful tool to design optimal curing cycles for thermosetting resins avoiding temperatures closer to the degradation temperature of the system and avoiding significant temperature gradients inside the sample.
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