engleski

Cure modeling of polyester thermosets in the copper mold

The cure of unsaturated polyester was studied experimentally and using a model of the process. The kinetic parameters were calculated from the heat flow-time curves obtained by differential scanning calorimetry (DSC, Netzsch-Simultaneous Thermal Analyzer DSC 200), working in DSC (dynamic) mode. The temperature-time histories were studied in a copper mold cylindrically shaped. Taking into account the heat transferred due to conduction through the resin, as well as the kinetics of heat generated in the cure reaction, a numerical model was constructed. The contributions to the rise in temperature from heat conduction and chemical reaction are different in different parts of the composite, which can explain the temperature-time, or conversion-time histories. Introduction of a carbon base filler reduced the amount of heat released in the composite and, as a result, lowered the temperatures through the resin. Finally, a good agreement between experimental data and the predicted mathematical model of the curing process in the mold was observed.

thermoset ; DSC ; curing ; polyester resin ; inert filler ; mold ; kinetic model

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