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Thermal analysis applied to the characterization of degradation in soil of polylactide: I. Calorimetric and viscoelastic analyses
Instituto de Tecnología de Materiales, Universidad Politécnica de Valencia, Spain.
Instituto de Investigación en Tecnología de Materiales, Universidad Politécnica de Valencia, Spain.ORCID iD: 0000-0002-0252-337X
Instituto de Tecnología de Materiales, Universidad Politécnica de Valencia, Spain.
Instituto de Tecnología de Materiales, Universidad Politécnica de Valencia, Spain.
2010 (English)In: Polymer degradation and stability, ISSN 0141-3910, E-ISSN 1873-2321, Vol. 95, no 11, p. 2185-2191Article in journal (Refereed) Published
Abstract [en]

An accelerated soil burial test has been performed on a commercial polylactide (PLA) for simulating non-controlled disposal. Degradation in soil promotes physical and chemical changes in polylactide properties, which can be characterized by Thermal Analysis techniques. Physical changes occurred in polylactide due to the degradation in soil were evaluated by correlating their calorimetric and viscoelastic properties. It is highly remarkable that each calorimetric scan offers specific and enlightening information. Degradation in soil affects the polylactide chains reorganization. A multimodal melting behavior is observed for buried PLA, degradation in soil also promotes the enlarging the lamellar thickness distribution of the population with bigger average size. Morphological changes due to degradation in soil lead to an increase in the free volume of the polylactide chains in the amorphous phase that highly affected the bulk properties. Thermal Analysis techniques provide reliable indicators of the degradation stage of polylactide induced by degradation in soil, as corroborated by molecular weight analysis. © 2010 Elsevier Ltd. All rights reserved.

Place, publisher, year, edition, pages
2010. Vol. 95, no 11, p. 2185-2191
Keywords [en]
Degradation in soil, Differential Scanning Calorimetry (DSC), Dynamic-Mechanical-Thermal Analysis (DMTA), Free volume, Lamellar thickness distribution, Polylactide (PLA), Amorphous phase, Average size, Bulk properties, Chemical change, Lamellar thickness, Melting behavior, Molecular weight analysis, Morphological changes, Multi-modal, Physical changes, Poly lactide, Polylactides, Soil burial test, Thermal analysis, Thermal analysis techniques, Viscoelastic analysis, Viscoelastic properties, Degradation, Differential scanning calorimetry, Dynamic mechanical analysis, Dynamics, Polymer blends, Soils, Thermoanalysis, Thickness control, Soil testing
National Category
Polymer Technologies
Identifiers
URN: urn:nbn:se:his:diva-15887DOI: 10.1016/j.polymdegradstab.2010.08.005ISI: 000283907500007Scopus ID: 2-s2.0-77957874996OAI: oai:DiVA.org:his-15887DiVA, id: diva2:1229283
Conference
2nd International Conference on Biodegradable Polymers and Sustainable Composites - Alicante, October 2009
Available from: 2018-06-29 Created: 2018-06-29 Last updated: 2019-02-12Bibliographically approved

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Moriana, Rosana

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