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Disintegrability under composting conditions of plasticized PLA-PHB blends

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Disintegrability under composting conditions of plasticized PLA-PHB blends

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dc.contributor.author Arrieta, Marina Patricia es_ES
dc.contributor.author López Martínez, Juan es_ES
dc.contributor.author Rayón Encinas, Emilio es_ES
dc.contributor.author Jiménez, A. es_ES
dc.date.accessioned 2015-12-10T11:31:57Z
dc.date.available 2015-12-10T11:31:57Z
dc.date.issued 2014-10
dc.identifier.issn 0141-3910
dc.identifier.uri http://hdl.handle.net/10251/58697
dc.description.abstract The disintegration under composting conditions of films based on poly(lactic acid) poly(hydroxybutyrate) (PLA-PHB) blends and intended for food packaging was studied. Two different plasticizers, poly(ethylene glycol) (PEG) and acetyl-tri-n-butyl citrate (ATBC), were used to limit the inherent brittleness of both biopolymers. Neat PLA, plasticized PLA and PLA-PHB films were processed by melt-blending and compression molding and they were further treated under composting conditions in a laboratory-scale test at 58 +/- 2 degrees C. Disintegration levels were evaluated by monitoring their weight loss at different times: 0, 7, 14, 21 and 28 days. Morphological changes in all formulations were followed by optical and scanning electron microscopy (SEM). The influence of plasticizers on the disintegration of PLA and PLA-PHB blends was studied by evaluating their thermal and nanomechanical properties by thermogravimetric analysis (TGA) and the nanoindentation technique, respectively. Meanwhile, structural changes were followed by Fourier transformed infrared spectroscopy (FTIR). The ability of PHB to act as nucleating agent in PLA-PHB blends slowed down the PLA disintegration, while plasticizers speeded it up. The relationship between the mesolactide to lactide forms of PLA was calculated with a Pyrolysis-Gas Chromatography-Mass Spectrometry device (Py-GC/MS), revealing that the mesolactide form increased during composting. (C) 2014 Elsevier Ltd. All rights reserved. es_ES
dc.description.sponsorship Authors thank Spanish Ministry of Economy and Competitiveness by financial support (MAT2011-28468-C02-01 and MAT2011-28468-C02-02). M.P. Arrieta thanks Generalitat Valenciana for Santiago Grisolia Fellowship (2011/007). Authors gratefully acknowledge Prof. M<SUP>a</SUP> Dolores Salvador (Polytechnic University of Valencia) for her assistance with nanomechanical and optical microscope analysis. en_EN
dc.language Inglés es_ES
dc.publisher Elsevier es_ES
dc.relation.ispartof Polymer Degradation and Stability es_ES
dc.rights Reserva de todos los derechos es_ES
dc.subject Poly(lactic acid) es_ES
dc.subject Poly(hydroxybutyrate) es_ES
dc.subject Blend es_ES
dc.subject Biodegradable es_ES
dc.subject Plasticizers es_ES
dc.subject.classification CIENCIA DE LOS MATERIALES E INGENIERIA METALURGICA es_ES
dc.title Disintegrability under composting conditions of plasticized PLA-PHB blends es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.1016/j.polymdegradstab.2014.01.034
dc.relation.projectID info:eu-repo/grantAgreement/MICINN//MAT2011-28468-C02-02/ES/PROCESADO DE SISTEMAS LAMINADOS EN BASE BIOPOLIMERICA PARA EL ENVASADO ACTIVO DE ALIMENTOS/ es_ES
dc.relation.projectID info:eu-repo/grantAgreement/GVA//GRISOLIA%2F2011%2F007/ es_ES
dc.relation.projectID info:eu-repo/grantAgreement/MICINN//MAT2011-28468-C02-01/ES/FORMULACION Y CARACTERIZACION DE BIOPOLIMEROS PARA SISTEMAS LAMINADOS EN ENVASADO DE ALIMENTOS/ es_ES
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. Departamento de Ingeniería Mecánica y de Materiales - Departament d'Enginyeria Mecànica i de Materials es_ES
dc.description.bibliographicCitation Arrieta, MP.; López Martínez, J.; Rayón Encinas, E.; Jiménez, A. (2014). Disintegrability under composting conditions of plasticized PLA-PHB blends. Polymer Degradation and Stability. 108:307-318. https://doi.org/10.1016/j.polymdegradstab.2014.01.034 es_ES
dc.description.accrualMethod S es_ES
dc.relation.publisherversion http://dx.doi.org/10.1016/j.polymdegradstab.2014.01.034 es_ES
dc.description.upvformatpinicio 307 es_ES
dc.description.upvformatpfin 318 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 108 es_ES
dc.relation.senia 276611 es_ES
dc.identifier.eissn 1873-2321
dc.contributor.funder Ministerio de Ciencia e Innovación es_ES
dc.contributor.funder Generalitat Valenciana es_ES


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