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R. Pilawka, H. Mąka

Kinetics of thermal decomposition of isocyanate-epoxy materials crosslinked in the presence of 1-ethylimidazole accelerator

Polimery 2014, No 5, 409


DOI: dx.doi.org/10.14314/polimery.2014.409

Abstract

The kinetics of thermal decomposition of isocyanate-epoxy materials crosslinked in the presence of 1-ethylimidazole (EMI) as accelerator was analyzed using Ozawa, Kissinger, Friedman, and Coats-Redfern methods. The thermal decomposition parameters of the cured isocyanate-epoxy system were determined by thermogravimetric analysis (TGA) at different heating rates. TG curves showed that the thermal decomposition of the isocyanate-epoxy system occurred in two steps despite EMI content. The thermal stability of the isocyanate-epoxy system increased with increase of EMI content (Ed) 1.2 wt %. The reason could be higher isocyanurate and oxazolidone ring contents, which enhance its thermal resistance properties.


Key words: isocyanate-epoxy materials, 1-ethylimidazole, thermal decomposition, Ozawa method, Kissinger method, Friedman method, Coast-Redfern method

e-mail: Ryszard.Pilawka@zut.edu.pl

R. Pilawka, H. Mąka (150.9 KB)
Kinetics of thermal decomposition of isocyanate-epoxy materials crosslinked in the presence of 1-ethylimidazole accelerator (in English)