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dc.contributor.authorLubineau, Gilles
dc.contributor.authorSulaimani, Anwar Ali
dc.contributor.authorEl Yagoubi, Jalal
dc.contributor.authorMulle, Matthieu
dc.contributor.authorVerdu, Jacques
dc.date.accessioned2017-05-17T07:41:39Z
dc.date.available2017-05-17T07:41:39Z
dc.date.issued2017-05-11
dc.identifier.citationLubineau G, Sulaimani A, El Yagoubi J, Mulle M, Verdu J (2017) Hysteresis in the relation between moisture uptake and electrical conductivity in neat epoxy. Polymer Degradation and Stability. Available: http://dx.doi.org/10.1016/j.polymdegradstab.2017.05.008.
dc.identifier.issn0141-3910
dc.identifier.doi10.1016/j.polymdegradstab.2017.05.008
dc.identifier.urihttp://hdl.handle.net/10754/623636
dc.description.abstractMonitoring 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.description.sponsorshipThe research reported in this publication was supported by funding from King Abdullah University of Science and Technology (KAUST). We thank KAUST for its continuous support.
dc.publisherElsevier BV
dc.relation.urlhttp://www.sciencedirect.com/science/article/pii/S0141391017301246
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in Polymer Degradation and Stability. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Polymer Degradation and Stability, [, , (2017-05-11)] DOI: 10.1016/j.polymdegradstab.2017.05.008 . © 2017. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectEpoxy
dc.subjectMoisture sorption
dc.subjectHydrolysis
dc.subjectElectrical properties
dc.subjectDiffusion
dc.titleHysteresis in the relation between moisture uptake and electrical conductivity in neat epoxy
dc.typeArticle
dc.contributor.departmentComposite and Heterogeneous Material Analysis and Simulation Laboratory (COHMAS)
dc.contributor.departmentMechanical Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalPolymer Degradation and Stability
dc.eprint.versionPost-print
dc.contributor.institutionUniv. Bordeaux, I2M, UMR 5295, F-33400 Talence, France
dc.contributor.institutionArts et Metiers ParisTech, Laboratoire PIMM, 151 Boulevard de l’Hopital, 75013 Paris, France
kaust.personLubineau, Gilles
kaust.personSulaimani, Anwar Ali
kaust.personMulle, Matthieu
refterms.dateFOA2019-05-11T00:00:00Z
dc.date.published-online2017-05-11
dc.date.published-print2017-07


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