Effect of sisal and hydrothermal ageing on the dielectric behaviour of polylactide/sisal biocomposites
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Effect of sisal and hydrothermal ageing on the dielectric behaviour of polylactide/sisal biocomposites

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Effect of sisal and hydrothermal ageing on the dielectric behaviour of polylactide/sisal biocomposites

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dc.contributor.author Badia Valiente, José David
dc.contributor.author Reig-Rodrigo, P.
dc.contributor.author Teruel-Juanes, Roberto
dc.contributor.author Kittikorn, T.
dc.contributor.author Strömberg, E.
dc.contributor.author Ek, M.
dc.contributor.author Karlsson, S.
dc.contributor.author Ribes Greus, A.
dc.date.accessioned 2019-10-21T14:32:10Z
dc.date.available 2019-10-21T14:32:10Z
dc.date.issued 2017
dc.identifier.uri https://hdl.handle.net/10550/71781
dc.description.abstract The dielectric properties of virgin polylactide (PLA) and its reinforced composites with different weight amounts of sisal fibres were assessed at broad temperature (from −130 °C to 130 °C) and frequency ranges (from 10-2 -10 7 Hz), before and after being subjected to accelerated hydrothermal ageing. The synergetic effects of both the loading of sisal and hydrothermal ageing were analysed by means of dielectric relaxation spectra. The relaxation time functions were evaluated by the Havriliak-Negami model, substracting the ohmic contribution of conductivity. The intramolecular and intermolecular relaxations were respectively analysed by means of Arrhenius and Vogel-Fulcher-Tammann-Hesse thermal activation models. The addition of fibre increased the number of hydrogen bonds, which incremented the dielectric permittivity and mainly hindered the non-cooperative relaxations of the biocomposites by increasing the activation energy. Hydrothermal ageing enhanced the formation of the crystalline phase at the so-called transcrystalline region along sisal. This fact hindered the movement of the amorphous PLA fraction, and consequently decreased the dielectric permittivity and increased the dynamic fragility.
dc.language.iso eng
dc.relation.ispartof Composites Science and Technology, 2017, vol. 149, p. 1-10
dc.rights.uri info:eu-repo/semantics/openAccess
dc.source Badia Valiente, José David Reig-Rodrigo, P. Teruel-Juanes, Roberto Kittikorn, T. Strömberg, E. Ek, M. Karlsson, S. Ribes Greus, A. 2017 Effect of sisal and hydrothermal ageing on the dielectric behaviour of polylactide/sisal biocomposites Composites Science and Technology 149 1 10
dc.subject Termoplàstics
dc.subject Materials compostos
dc.title Effect of sisal and hydrothermal ageing on the dielectric behaviour of polylactide/sisal biocomposites
dc.type info:eu-repo/semantics/article
dc.date.updated 2019-10-21T14:32:11Z
dc.identifier.doi https://doi.org/10.1016/j.compscitech.2017.05.026
dc.identifier.idgrec 124459

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