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A thermogravimetric approach to study the influence of a biodegradation in soil test to a Poly(lactic acid)
Universidad Politécnica de Valencia, Spain.
Universidad Politécnica de Valencia, Spain.ORCID iD: 0000-0002-0252-337X
Universidad Politécnica de Valencia, Spain.
Universidad Politécnica de Valencia, Spain.
2008 (English)In: Macromolecular Symposia, ISSN 1022-1360, E-ISSN 1521-3900, Vol. 272, no 1, p. 93-99Article in journal (Refereed) Published
Abstract [en]

An amorphous grade Poly (lactic acid) (PLA) was selected for an accelerated burial in soil test during 450 days. Thermogravimetric analyses were carried out to study the effects of degradation in soil on the thermal stability and the thermal decomposition kinetics. A single stage decomposition process is observed for all degradation times. It is shown that the thermal stability of PLA is slightly affected by degradation in soil. Concerning the study of the thermal decomposition kinetics, Criado master curves were plotted from experimental data to focus the study of the thermodegradation kinetic model.The kinetic methods proposed by Broido and Chang were used to calculate the apparent activation energies (Ea) of the degradation mechanism. These results were compared to the Ea values obtained by the method developed by Coats and Redfern in order to prove the applicability of the former methods to the kinetic study. As expected, non-linear tendency is found out for Ea variation along the degradation times, which can be explained as an evolution by stages. Copyright © 2008 WILEY-VCH Verlag GmbH & Co. KGaA.

Place, publisher, year, edition, pages
2008. Vol. 272, no 1, p. 93-99
Keywords [en]
Activation energy, Biodegradation in soil, Kinetics (polim.), Poly(lactic acid), Thermogravimetry analysis (TGA), ABS resins, Acids, Biochemistry, Biodegradation, Body fluids, Decomposition, Gravimetric analysis, Lactic acid, Microbiology, Organic acids, Photoresists, Pyrolysis, Soil testing, Soils, Thermodynamic stability, Thermogravimetric analysis, Apparent activation energies, Decomposition processes, Degradation mechanisms, Degradation times, Experimental datums, Kinetic methods, Kinetic studies, Master curves, Polylactic acids, Single stages, Soil tests, Thermal decomposition kinetics, Thermal stabilities, Degradation
Identifiers
URN: urn:nbn:se:his:diva-15884DOI: 10.1002/masy.200851213ISI: 000261674400013Scopus ID: 2-s2.0-55849148364OAI: oai:DiVA.org:his-15884DiVA, id: diva2:1229197
Conference
International Conference on (Bio)degradable Polymers from Renewable Resources, Vienna, Austria, November 18-21, 2007
Available from: 2018-06-29 Created: 2018-06-29 Last updated: 2018-09-11

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Moriana, Rosana

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