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Thermodegradation kinetics of a hybrid inorganic-organic epoxy system
Authors:L. Barral,F.J. Dí  ez,S. Garcí  a-Garabal,J. Ló  pez,B. Montero,R. Montes,C. Ramí  rez,M. Rico
Affiliation:Departamento de Física, E. U. P. Ferrol, Universidad de A Coruña. Avda 19 de Febrero s/n, 15405 Ferrol, Spain
Abstract:Lifetime of the epoxy system formed by diglycidyl ether of bisphenol A, DGEBA/4,4′-diaminediphenylmethane, DDM, modified with the silsesquioxane, glycidylisobutyl-POSS, was calculated from thermogravimetric analysis. The activation energy of the decomposition of this system was evaluated by the integral method developed by Flynn-Wall-Ozawa (E = 88.9 ± 2.1 kJ mol−1) and by Coats and Redfern method (E = 85.2 ± 1.5 kJ mol−1). The kinetic parameters have been used to estimate the lifetime of the system POSS/DGEBA/DDM. The obtained results by two different ways are similar.
Keywords:Inorganic-organic hybrid   Thermogravimetry   Lifetime   Epoxy system
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