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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

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.citation	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.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.subject	Termoplàstics
dc.subject	Materials compostos
dc.title	Effect of sisal and hydrothermal ageing on the dielectric behaviour of polylactide/sisal biocomposites
dc.type	journal article	es_ES
dc.date.updated	2019-10-21T14:32:11Z
dc.identifier.doi	10.1016/j.compscitech.2017.05.026
dc.identifier.idgrec	124459
dc.rights.accessRights	open access	es_ES