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Kinetic and thermodynamic studies of an epoxy system diglycidyl ether of bisphenol‐A/1,2 diamine cyclohexane
Author(s) -
Núñez Lisardo,
Fraga F.,
Fraga L.,
Castro A.
Publication year - 1997
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/(sici)1097-4628(19970131)63:5<635::aid-app11>3.0.co;2-t
Subject(s) - diglycidyl ether , cyclohexane , reaction rate constant , gibbs free energy , epoxy , diamine , enthalpy , polymer chemistry , standard enthalpy of reaction , chemistry , differential scanning calorimetry , curing (chemistry) , ether , bisphenol a , thermodynamics , activation energy , reaction mechanism , materials science , kinetics , organic chemistry , physics , catalysis , quantum mechanics
The curing reaction of a system consisting of a purified diglycidyl ether of bisphenol‐A (BADGE, n = 0) and 1,2 diamine cyclohexane (DCH) was studied with a differential scanning calorimeter. The objective of this article was twofold: a kinetic study from which parameters such as reaction orders, rate constants, and activation energies were determined; and a thermodynamic study where values of enthalpy (Δ H # ), entropy (Δ S # ), and Gibbs free energy (Δ G # ) changes were calculated. This second study showed that an n ‐order path reaction mechanism was more favored than the autocatalyzed mechanism above 338 K. This fact was also checked when plotting rate constant ratio against temperature. © 1997 John Wiley & Sons, Inc. J Appl Polym Sci 63: 635–641, 1997