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Abstract

Curing reactions of the epoxy system consisting of a diglycidyl ether of bisphenol A (BADGE n=0) and m-xylylenediamine (m-XDA) were studied to calculate time-temperature-transformation (TTT) isothermal cure diagram for this system. Gel times were measured as a function of temperature using solubility test. Differential scanning calorimetry (DSC) was used to calculate the vitrification times. DSC data show a one-to-one relationship between T g and fractional conversion, a independent of cure temperature. As a consequence, T g can be used as a measure of conversion. The activation energy for the polymerization overall reaction was calculated from the gel times obtained using the solubility test (41.5 kJ mol-1). This value is similar to the results obtained for other similar epoxy systems. Isoconversion contours were calculated by numerical integration of the best fitting kinetic model.

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Correspondence to Lisardo Núñez.

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Núñez, L., Fraga, L., Núñez, M.R. et al. TTT Cure Diagram. Journal of Thermal Analysis and Calorimetry 70, 9–17 (2002). https://doi.org/10.1023/A:1020628911473

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  • DOI: https://doi.org/10.1023/A:1020628911473

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