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Kinetic Analysis of Isothermal and Nonisothermal Epoxy-Amine Cures by Model-Free Isoconversional Methods

✍ Scribed by François-Xavier Perrin; Thi Minh Hanh Nguyen; Jean-Louis Vernet

Publisher
John Wiley and Sons
Year
2007
Tongue
English
Weight
232 KB
Volume
208
Category
Article
ISSN
1022-1352

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✦ Synopsis

Abstract

Model‐free and model‐fitting kinetic approaches were applied to isothermal and nonisothermal DSC data on epoxy cure. The dependence of the effective activation energy on the extent of cure was determined using integral and differential isoconversional methods. A different shape of the dependence in the kinetically controlled regime (α < 0.4) was found when compared to the dependence typically reported for epoxy‐amine systems. This result was shown to arise from the presence of low amounts of bisphenol A in the present epoxy that are efficient catalysts for epoxy amine reaction. A model‐free method prediction of isothermal cure from isothermal data has also been considered.

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