Interval Analysis: A New Tool for the Characterization of an Epoxy-Amine-Aluminum SystemReport as inadecuate




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1 CIRIMAT - Centre interuniversitaire de recherche et d-ingenierie des matériaux 2 LAPLACE - Laboratoire Plasma et Conversion d-Energie Toulouse

Abstract : Epoxy-amine-aluminum chemical systems or sandwich structures with and without interphase formation are prepared using two different curing cycles and are characterized with dielectric spectroscopy. The sample without interphase formation is obtained when the reaction between epoxy and amine groups is favored, which occurs at high temperature. The interphase formation results from the reaction between the amine group and aluminum surface at room temperature. Dielectric spectra are fitted using the Set Inversion Via Interval Analysis SIVIA algorithm applied to DiElectric spectroscopy algorithm SADE developed using the method of intervals analysis. A new approach is implemented using a sum of Debye relaxations to optimize and guarantee the fitting. The results achieved show a distribution of relaxation times, which always take place at the same time as demonstrated. In this study, five Debye relaxations were found which fit the β-relaxation with our model. Finally, we showed that the more intensive of our five β-relaxations follows the Arrhenius law.

Keywords : Epoxy-amine Dielectric spectroscopy Modelisation β-relaxation Data processing interphase





Author: Mickaël Pomes-Hadda - Maëlenn Aufray - Sombel Diaham -

Source: https://hal.archives-ouvertes.fr/



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