Abstract
Epoxy resin of bisphenol-C (EBC), its ricinoleate- and linoleate-based polyols have been cured using 5–25 wt% triethylamine and toluene-2,4-di-isocyanate at 100° and 140°C, respectively. Cured resins are insoluble in common solvents and characterized by IR, DSC and TGA. Amine-cured resin was thermally stable up to about 309–318°C and followed 1.5-order degradation kinetics. Ricinoleate-based polyurethane was thermally stable up to about 215°C and followed 0.43-, 0.75-, and 1.12-order degradation kinetics. Linoleate-based polyurethane was thermally stable up to about 260°C and followed, respectively, 1.9- and 0.93-order degradation kinetics. Kinetic parameters are interpreted in light of resin structure and nature of hardeners used. Amine-cured epoxy resin possesses better thermal properties than those of its polyols-based polyurethanes.
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