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Mechanical, dielectric, and physicochemical properties of impregnating resin based on unsaturated polyesterimides

Fetouhi, Louiza and Petitgas, Benoit and Dantras, Eric and Martinez Vega, Juan Jorge Mechanical, dielectric, and physicochemical properties of impregnating resin based on unsaturated polyesterimides. (2017) The European Physical Journal Applied Physics, 80 (1). 10901/1-10901/10. ISSN 1286-0042

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Official URL: http://dx.doi.org/10.1051/epjap/2017160451

Abstract

This work aims to characterize the dielectric and the mechanical properties of a resin based on an unsaturated polyesterimide diluted in methacrylate reactive diluents used in the impregnation of rotating machines. The broadband dielectric spectrometry and the dynamic mechanical analysis were used to quantify the changes in dielectric and mechanical properties of the network PEI resin, as a function of temperature and frequency. The network characterizations highlight the presence of two main relaxations, a and a0, confirmed by the differential scanning calorimetry analysis, showing the complexity of the chemical composition of this resin. The dielectric spectroscopy shows a significant increase in the dielectric values due to an increase of the material conductivity, while the mechanical spectroscopy shows an important decrease of the polymer rigidity and viscosity expressed by an important decrease in the storage modulus. The PEI resin shows a high reactivity when it is submitted in successive heating ramps, which involves in a post-cross-linking reaction.

Item Type:Article
Additional Information:Thanks to EDP Sciences editor. The original PDF of the article can be found at https://www.epjap.org/articles/epjap/abs/2017/10/ap160451/ap160451.html
HAL Id:hal-01668768
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Other partners > Nihon Densan Kabushiki Kaisha - NIDEC (JAPAN)
Laboratory name:
Funders:
Leroy-Somer Company - ANRT France
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Deposited By: cirimat webmestre
Deposited On:20 Dec 2017 10:50

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