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Impact of hydrothermal ageing on the thermal stability, morphology and viscoelastic performance of PLA/sisal biocomposites

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Impact of hydrothermal ageing on the thermal stability, morphology and viscoelastic performance of PLA/sisal biocomposites

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dc.contributor.author Gil Castell, Óscar es_ES
dc.contributor.author Badía Valiente, José David es_ES
dc.contributor.author Kittikorn, T. es_ES
dc.contributor.author Strömberg, E. es_ES
dc.contributor.author Ek, Martina es_ES
dc.contributor.author Karlsson, S. es_ES
dc.contributor.author Ribes Greus, María Desamparados es_ES
dc.date.accessioned 2017-05-02T10:07:36Z
dc.date.available 2017-05-02T10:07:36Z
dc.date.issued 2016-10
dc.identifier.issn 0141-3910
dc.identifier.uri http://hdl.handle.net/10251/80303
dc.description.abstract The influence of the combined exposure to water and temperature on the behaviour of polylactide/sisal biocomposites coupled with maleic acid anhydride was assessed through accelerated hydrothermal ageing. The biocomposites were immersed in water at temperatures from 65 to 85 °C, between the glass transition and cold crystallisation of the PLA matrix. The results showed that the most influent factor for water absorption was the percentage of fibres, followed by the presence of coupling agent, whereas the effect of the temperature was not significant. Deep assessment was devoted to biocomposites subjected to hydrothermal ageing at 85 °C, since it represents the extreme degrading condition. The morphology and crystallinity of the biocomposites were evaluated by means of X-Ray diffraction (XRD) and field emission scanning electron microscopy (FE-SEM). The viscoelastic and thermal performance were assessed by means of dynamic mechanic thermal analysis (DMTA) and thermogravimetry (TGA). The presence of sisal generally diminished the thermal stability of the biocomposites, which was mitigated by the addition of the coupling agent. After composite preparation, the effectiveness of the sisal fibre was improved by the crystallisation of PLA around sisal, which increased the storage modulus and reduced the dampening factor. The presence of the coupling agent strengthened this effect. After hydrothermal ageing, crystallisation was promoted in all biocomposites therefore showing more fragile behaviour evidencing pores and cracks. However, the addition of coupling agent in the formulation of biocomposites contributed in all cases to minimise the effects of hydrothermal ageing. es_ES
dc.description.sponsorship The authors would like to acknowledge the Spanish Ministry of Economy and Competitiveness, through the Research Project ENE2014-53734-C2-1-R and UPOV13-3E-1947. The Spanish Ministry of Education, Culture and Sports is also thanked for the pre-doctoral FPU grant of O. Gil-Castell (FPU13/01916). Generalitat Valenciana is thanked for the APOSTD14/041 program for J.D. Badia. The Chilean Government is thanked for the 13CEI2-21839 project. The financial support given by the Prince of Songkla University and KTH Royal Institute of Technology is gratefully acknowledged. en_EN
dc.language Inglés es_ES
dc.publisher Elsevier es_ES
dc.relation Spanish Ministry of Economy and Competitiveness ENE2014-53734-C2-1-R es_ES
dc.relation Spanish Ministry of Economy and Competitiveness UPOV13-3E-1947 es_ES
dc.relation FPU FPU13/01916 es_ES
dc.relation Generalitat Valenciana APOSTD14/041 es_ES
dc.relation Chilean Government 13CEI2-21839 es_ES
dc.relation Prince of Songkla University es_ES
dc.relation KTH Royal Institute of Technology es_ES
dc.relation.ispartof Polymer Degradation and Stability es_ES
dc.rights Reserva de todos los derechos es_ES
dc.subject Biocomposites es_ES
dc.subject Polylactide (PLA) es_ES
dc.subject Natural fibres es_ES
dc.subject Sisal es_ES
dc.subject Hydrothermal ageing es_ES
dc.subject Degradation es_ES
dc.subject Performance es_ES
dc.subject Mechanical fibre effectivenes es_ES
dc.subject.classification MAQUINAS Y MOTORES TERMICOS es_ES
dc.subject.classification CIENCIA DE LOS MATERIALES E INGENIERIA METALURGICA es_ES
dc.title Impact of hydrothermal ageing on the thermal stability, morphology and viscoelastic performance of PLA/sisal biocomposites es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.1016/j.polymdegradstab.2016.03.038
dc.rights.accessRights Abierto es_ES
dc.contributor.affiliation Universitat Politècnica de València. Instituto de Tecnología de Materiales - Institut de Tecnologia de Materials es_ES
dc.contributor.affiliation Universitat Politècnica de València. Escuela Técnica Superior de Ingeniería del Diseño - Escola Tècnica Superior d'Enginyeria del Disseny es_ES
dc.description.bibliographicCitation Gil Castell, Ó.; Badía Valiente, JD.; Kittikorn, T.; Strömberg, E.; Ek, M.; Karlsson, S.; Ribes Greus, MD. (2016). Impact of hydrothermal ageing on the thermal stability, morphology and viscoelastic performance of PLA/sisal biocomposites. Polymer Degradation and Stability. 132:87-96. doi:10.1016/j.polymdegradstab.2016.03.038 es_ES
dc.description.accrualMethod Senia es_ES
dc.relation.publisherversion http://dx.doi.org/10.1016/j.polymdegradstab.2016.03.038 es_ES
dc.description.upvformatpinicio 87 es_ES
dc.description.upvformatpfin 96 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 132 es_ES
dc.relation.senia 317137 es_ES


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