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Study of an epoxy system cured with different diamines by differential scanning calorimetry
Author(s) -
Ramírez C.,
Rico M.,
López J.,
Montero B.,
Montes R.
Publication year - 2006
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.25074
Subject(s) - differential scanning calorimetry , diglycidyl ether , epoxy , autocatalysis , activation energy , kinetics , materials science , isothermal process , diffusion , polymer chemistry , bisphenol a , kinetic energy , thermodynamics , chemical engineering , chemistry , composite material , physics , engineering , quantum mechanics
Kinetic and cured reaction experiments for five systems based on the epoxy resin diglycidyl ether of bisphenol A (DGEBA) cured with the diamines 1,3‐bisaminomethylcyclohexane, 4‐4′‐diaminediphenylmetane, 1,4‐phenylediamine, 4‐4′(1,3‐phenylenediisopropylidene) bisaniline, and 4‐4′metilenebis(2,6‐dietilaniline) were carried out by differential scanning calorimetry. Kinetic analysis was performed using dynamic experiments through the Kissinger and Flynn–Wall–Ozawa methods. The isothermal experimental data showed an autocatalytic behavior compared with the model proposed by Kamal. Activation energy and kinetic parameters were determined by fitting experimental data. This model provided a good description of the cure kinetics up to onset of vitrification. Diffusion control was incorporated to describe the postvitrification region. By combining the autocatalytic model and the diffusion factor, it was possible to predict the cure kinetics over the whole conversion range. The behavior of the cure kinetics of the DGEBA was similar with all the diamines used. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 103: 1759–1768, 2007