Isoconversional kinetic analysis of the alkyd/melamine resins curing

Chemical Industry and Chemical Engineering Quarterly

关键词: coating;    thermosetting resins;    curing;    DSC;    isoconversional methods;   

DOI  :  10.2298/CICEQ111110059J

来源: DOAJ

【 摘 要 】

The curing reaction for the mixtures of alkyd resins based on ricinoleicacid, phthalic anhydride and three polyols (glycerin, trimethylolpropane orethoxylated pentaerythritol) with two different commercial melamine resinswas investigated by differential scanning calorimetry (DSC). The curingkinetics analysis was performed using the isoconversional methods(Ozawa-Flynn-Wall, Kissinger-Akahira-Sunose and Friedman). Isoconversionalmethods were carried out with three heating rates (5, 10 and 20°C/min) in ascanning temperature range from 40 to 250°C. It was found that the curingactivation energy of resin mixtures is influenced by alkyd and melamine resintype due to the catalytic effect of hydroxyl group on the reactions. Thedependence of apparent curing degree on time, which was obtained bymathematical transformations of dynamic DSC data using Ozawa-Flynn-Wallmethod, describes well the isothermal DSC experiments.

【 授权许可】

Unknown