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Control of Microwave Process for Polymer Curing by Dielectric Property Measurements in a Broad Frequency Range, 1 MHz-10 GHz

Published online by Cambridge University Press:  10 February 2011

O. Meyer ,
N. Belhadj-Tahar  and
A. Fourrier-Lamer
O. Meyer
Affiliation:
Laboratoire de Dispositifs Infrarouge et Micro-ondes, Universitd Pierre et Marie Curie Case 92 T12 E2, 4 place Jussieu 75252 PARIS Cedex 05 FRANCE., 33-1-44 27 43 72, 33-1 44 27 43 82
N. Belhadj-Tahar
Affiliation:
Laboratoire de Dispositifs Infrarouge et Micro-ondes, Universitd Pierre et Marie Curie Case 92 T12 E2, 4 place Jussieu 75252 PARIS Cedex 05 FRANCE., 33-1-44 27 43 72, 33-1 44 27 43 82
A. Fourrier-Lamer
Affiliation:
Laboratoire de Dispositifs Infrarouge et Micro-ondes, Universitd Pierre et Marie Curie Case 92 T12 E2, 4 place Jussieu 75252 PARIS Cedex 05 FRANCE., 33-1-44 27 43 72, 33-1 44 27 43 82
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Abstract

Let us present a new automatic system which couples a high power circuit (2.45 GHz) for heating with a low power one, for broad frequency band measurements of dielectric permittivity (1 MHz-10 GHz). The sample under microwave curing consists in an epoxy resin + hardener complex (DGEBA+DDS). The broad band spectra shows the existence of a dielectric relaxation. This absorption is used as a marker to describe the evolution of the reaction in relation with time and temperature, in terms of conversion ratio, kinetic velocity and quality. The phenomenum of microwave activation and interactions between permanent molecular dipoles and electromagnetic waves form the subject of this study. We also try to establish the specificity of microwave curing from a microscopic point of view. This work emphasizes new concepts which concern microwave chemistry.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 430: Symposium O – Microwave Processing of Materials V , 1996 , 587
Copyright
Copyright © Materials Research Society 1996

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References

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