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Cure kinetics of a diglycidyl ether of bisphenol a epoxy network ( n = 0) with isophorone diamine
Author(s) -
Fraga Francisco,
Penas Marcos,
Castro Carlos,
RodríguezNúñez Eugenio,
MartínezAgeitos José Manuel
Publication year - 2007
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.26989
Subject(s) - diglycidyl ether , epoxy , isophorone , curing (chemistry) , diamine , differential scanning calorimetry , bisphenol a , enthalpy , gibbs free energy , standard enthalpy of reaction , materials science , polymer chemistry , isophorone diisocyanate , glass transition , thermodynamics , reaction rate , isothermal process , chemistry , organic chemistry , polymer , composite material , polyurethane , catalysis , physics
The study of the cure reaction of a diglycidyl ether of bisphenol A epoxy network with isophorone diamine is interesting for evaluating the industrial behavior of this material. The total enthalpy of reaction, the glass‐transition temperature, and the partial enthalpies at different curing temperatures have been determined with differential scanning calorimetry in dynamic and isothermal modes. With these experimental data, the degree of conversion and the reaction rate have been obtained. A kinetic model introduces the mechanisms occurring during an epoxy chemical cure reaction. A modification of the kinetic model accounting for the influence of the diffusion of the reactive groups at high conversions is used. A thermodynamic study has allowed the calculation of the enthalpy, entropy, and Gibbs free energy. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2007