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Kinetic and thermodynamic studies of an epoxy system diglycidyl ether of bisphenol-A/1,2 diamine cyclohexane

✍ Scribed by Lisardo Núñez; F. Fraga; L. Fraga; A. Castro

Publisher
John Wiley and Sons
Year
1997
Tongue
English
Weight
241 KB
Volume
63
Category
Article
ISSN
0021-8995

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✦ Synopsis

The curing reaction of a system consisting of a purified diglycidyl ether of bisphenol-A (BADGE, n Å 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 ( DH # ), entropy ( DS # ), and Gibbs free energy ( DG # ) 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.

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