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Effects of diffusion on the kinetic study and TTT cure diagram for an epoxy/diamine system
Author(s) -
Núñez Lisardo,
Fraga F.,
Núñez M. R.,
Villanueva M.
Publication year - 1998
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(19981205)70:10<1931::aid-app7>3.0.co;2-6
Subject(s) - epoxy , diglycidyl ether , differential scanning calorimetry , curing (chemistry) , isothermal process , materials science , diamine , polymer chemistry , glass transition , kinetics , bisphenol a , vitrification , cyclohexane , diffusion , thermodynamics , composite material , chemistry , polymer , organic chemistry , physics , medicine , quantum mechanics , andrology
The curing reactions of an epoxy system consisting of a diglycidyl ether of bisphenol A (BADGE n = 0) and 1,2‐diamine cyclohexane (DCH) were studied to determine a time–temperature–transformation (TTT) isothermal cure diagram for this system. Differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA), and a solubility test were used to obtain the different experimental data reported. Two models, one based solely on chemical kinetics and the other accounting for diffusion, were used and compared to the experimental data. The inclusion of a diffusion factor in the second model allowed for the cure kinetics to be predicted over the whole range of conversion covering both pre‐ and post‐vitrification stages. The investigation was made in the temperature range 60–100°C, which is considered optimum for the isothermal curing of the epoxy system studied. © 1998 John Wiley & Sons, Inc. J Appl Polym Sci 70: 1931–1938, 1998