Abstract
Kinetic data and mechanisms of the thermal degradation of an epoxy/amine system were investigated by dynamic thermogravimetry in a nitrogen atmosphere over the temperature range 25°C-500°C and at a constant heating rate of 10°C/min. One sample without metallic filler and three composites with 30% of various metallic fillers (Zn. Cu and Zn Cu alloy) were selected. The thermogravimetric curves were analysed by digital image processing techniques. The kinetic data and the mechanisms were evaluated according to the methods of Freeman and Carroll, Schlomilch. and Krevelen el al. The study showed: (a) a high correlation among the kinetic data and also among the reaction mechanisms: (b) a decrease in the activation energy of the thermal degradation of the epoxy amine materials in the presence of metallic fillers: (c) the material with Zn/Cu alloy had the lowest activation energy in comparison to those of the respective pure metals: and (d) high reproducibility and reliability of the results obtained by the digital technique used.