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Thermal analysis applied to the characterization of degradation in soil of polylactide: II. on the thermal stability and thermal decomposition kinetics
Instituto de Investigación en Tecnología de Materiales, Universidad Politécnica de Valencia, Spain.
Instituto de Investigación en 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 Investigación en 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. 2192-2199Article in journal (Refereed) Published
Abstract [en]

The disposal stage of polylactide (PLA) was assessed by burying it in active soil following an international standard. Degradation in soil promotes physical and chemical changes in the polylactide properties. The characterization of the extent of degradation underwent by PLA was carried out by using Thermal Analysis techniques. In this paper, studies on the thermal stability and the thermal decomposition kinetics were performed in order to assess the degradation process of a commercial PLA submitted to an accelerated soil burial test by means of multi-linear-non-isothermal thermogravimetric analyses. Results have been correlated to changes in molecular weight, showing the same evolution as that described by the parameters of thermal stability temperatures and apparent activation energies. The decomposition reactions can be described by two competitive different mechanisms: Nucleation model (A2) and Reaction Contracting Volume model (R3). The changes in the kinetic parameters and kinetic models are in agreement with the calorimetric and dynamic-mechanical-thermal results, presented in the Part I of the study [1]. © 2010 Elsevier Ltd. All rights reserved.

Place, publisher, year, edition, pages
2010. Vol. 95, no 11, p. 2192-2199
Keywords [en]
Degradation in soil, Isoconversional methods, Polylactide, Thermal decomposition kinetic analysis, Active soils, Apparent activation energy, Chemical change, Decomposition reaction, Degradation process, Different mechanisms, International standards, Iso-conversional method, Kinetic models, Nonisothermal, Nucleation models, Poly lactide, Polylactides, Soil burial test, Thermal analysis, Thermal analysis techniques, Thermal decomposition kinetics, Thermal stability, Volume models, Activation energy, Degradation, Pyrolysis, Reaction kinetics, Soils, Thermodynamic stability, Thermogravimetric analysis, Soil testing
National Category
Polymer Technologies
Identifiers
URN: urn:nbn:se:his:diva-15886DOI: 10.1016/j.polymdegradstab.2010.06.002ISI: 000283907500008Scopus ID: 2-s2.0-77957879236OAI: oai:DiVA.org:his-15886DiVA, id: diva2:1229261
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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