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Hysteresis in the relation between moisture uptake and electrical conductivity in neat epoxy

hal.structure.identifierKing Abdullah University of Science and Technology [Saudi Arabia] [KAUST]
dc.contributor.authorLUBINEAU, Gilles
hal.structure.identifierKing Abdullah University of Science and Technology [Saudi Arabia] [KAUST]
dc.contributor.authorSULAIMANI, Anwar
hal.structure.identifierInstitut de Mécanique et d'Ingénierie de Bordeaux [I2M]
dc.contributor.authorEL YAGOUBI, Jalal
hal.structure.identifierKing Abdullah University of Science and Technology [Saudi Arabia] [KAUST]
dc.contributor.authorMULLE, Matthieu
hal.structure.identifierLaboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
dc.contributor.authorVERDU, Jacques
dc.date.accessioned2021-05-14T09:49:21Z
dc.date.available2021-05-14T09:49:21Z
dc.date.issued2017
dc.identifier.issn0141-3910
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/77204
dc.description.abstractEnMonitoring changes in electrical conductivity is a simple way to assess the water uptake from environmental moisture in polymers. However, the relation between water uptake and changes in conductivity is not fully understood. We monitored changes in the electrical volume conductivity of an anhydride-cured epoxy polymer during moisture sorption-desorption experiments. Gravimetric analysis showed that the polymer exhibits a two-stage sorption behavior resulting from the competition between diffusive and reactive mechanisms. As expected, the macroscopic electrical conductivity increases with the diffusion of water. However, our most surprising observation was severe hysteresis in the relation between water uptake and electrical conductivity during the sorption and desorption experiments. This indicates that change in the electrical conductivity depends on both the water uptake and the competition between the diffusive and reactive mechanisms. We studied samples with various thicknesses to determine the relative effects of the diffusive and reactive mechanisms. This is an important observation as it means that general electrical monitoring techniques should be used cautiously when it comes to measuring the moisture content of polymer or polymer-based composite samples.
dc.language.isoen
dc.publisherElsevier
dc.subject.enEpoxy
dc.subject.enMoisture sorption
dc.subject.enHydrolysis
dc.subject.enElectrical properties
dc.subject.enDiffusion
dc.title.enHysteresis in the relation between moisture uptake and electrical conductivity in neat epoxy
dc.typeArticle de revue
dc.identifier.doi10.1016/j.polymdegradstab.2017.05.008
dc.subject.halChimie/Polymères
bordeaux.journalPolymer Degradation and Stability
bordeaux.page54-57
bordeaux.volume141
bordeaux.hal.laboratoriesInstitut de Mécanique et d’Ingénierie de Bordeaux (I2M) - UMR 5295*
bordeaux.institutionUniversité de Bordeaux
bordeaux.institutionBordeaux INP
bordeaux.institutionCNRS
bordeaux.institutionINRAE
bordeaux.institutionArts et Métiers
bordeaux.peerReviewedoui
hal.identifierhal-01676219
hal.version1
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01676219v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Polymer%20Degradation%20and%20Stability&rft.date=2017&rft.volume=141&rft.spage=54-57&rft.epage=54-57&rft.eissn=0141-3910&rft.issn=0141-3910&rft.au=LUBINEAU,%20Gilles&SULAIMANI,%20Anwar&EL%20YAGOUBI,%20Jalal&MULLE,%20Matthieu&VERDU,%20Jacques&rft.genre=article


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