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Journal articles
Mechanical, dielectric, and physicochemical properties of impregnating resin based on unsaturated polyesterimides
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.
Cited literature [28 references]
https://hal.archives-ouvertes.fr/hal-01668768
Contributor : Open Archive Toulouse Archive Ouverte (oatao) <>
Submitted on : Wednesday, December 20, 2017 - 11:50:49 AM
Last modification on : Thursday, March 25, 2021 - 11:16:02 AM
Contributor : Open Archive Toulouse Archive Ouverte (oatao) <>
Submitted on : Wednesday, December 20, 2017 - 11:50:49 AM
Last modification on : Thursday, March 25, 2021 - 11:16:02 AM
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