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Melt viscoelastic assessment of Poly(Lactic Acid) composting: Influence of UV Ageing

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dc.title Melt viscoelastic assessment of Poly(Lactic Acid) composting: Influence of UV Ageing en
dc.contributor.author Verney, Vincent
dc.contributor.author Ramoné, Audrey
dc.contributor.author Delor-Jestin, Florence
dc.contributor.author Commereuc, Sophie
dc.contributor.author Koutný, Marek
dc.contributor.author Perchet, Geoffrey
dc.contributor.author Troquet, Julien
dc.relation.ispartof Molecules
dc.identifier.issn 1420-3049 OCLC, Ulrich, Sherpa/RoMEO, JCR
dc.date.issued 2018
utb.relation.volume 23
utb.relation.issue 10
dc.type article
dc.language.iso en
dc.publisher Multidisciplinary Digital Publishing Institute (MDPI AG)
dc.identifier.doi 10.3390/molecules23102682
dc.relation.uri https://www.mdpi.com/1420-3049/23/10/2682
dc.relation.uri https://www.mdpi.com/1420-3049/23/10/2682/pdf
dc.subject rheology en
dc.subject PLA en
dc.subject biodegradation en
dc.subject photo-degradation en
dc.description.abstract This study is devoted to the degradation pathway (bio, photo degradation and photo/bio) of Poly(Lactic acid) PLA polymers by means of melt viscoelasticity. A comparison was made between three PLA polymers with different microstructures (L, D stereoisomers). Biodegradability was determined during composting by burying the polymer films in compost at 58 _C. Melt viscoelasticity was used to assess the molecular evolution of the materials during the composting process. Viscoelastic data were plotted in the complex plane. We used this methodology to check the kinetics of the molecular weight decrease during the initial stages of the degradation, through the evolution of Newtonian viscosity. After a few days in compost, the Newtonian viscosity decreased sharply, meaning that macromolecular chain scissions began at the beginning of the experiments. However, a double molar mass distribution was also observed on Cole-Cole plots, indicating that there is also a chain recombination mechanism competing with the chain scission mechanism. PLA hydrolysis was observed by infra-red spectroscopy, where acid characteristic peaks appeared and became more intense during experiments, confirming hydrolytic activity during the first step of biodegradation. During UV ageing, polymer materials undergo a deep molecular evolution. After photo-degradation, lower viscosities were measured during biodegradation, but no significant differences in composting were found. © 2018 by the authors. en
utb.faculty Faculty of Technology
dc.identifier.uri http://hdl.handle.net/10563/1008263
utb.identifier.obdid 43878961
utb.identifier.scopus 2-s2.0-85055078641
utb.identifier.wok 000451201400277
utb.identifier.pubmed 30340360
utb.identifier.coden MOLEF
utb.source j-scopus
dc.date.accessioned 2018-11-19T13:50:59Z
dc.date.available 2018-11-19T13:50:59Z
utb.contributor.internalauthor Koutný, Marek
utb.wos.affiliation [Verney, Vincent; Ramone, Audrey; Delor-Jestin, Florence; Commereuc, Sophie] Univ Clermont Auvergne, ICCF, Sigma Clermont, CNRS,UMR 6296, F-63000 Clermont Ferrand, France; [Koutny, Marek] Tomas Bata Univ Zlin, Dept Environm Engn, Fac Technol, Zlin 76272, Czech Republic; [Perchet, Geoffrey; Troquet, Julien] Biobasic Environm, Biopole Clermont Limagne, F-63360 St Beauzire, France
utb.scopus.affiliation Institut de Chimie de Clermont Ferrand (ICCF), UMR 6296 Université Clermont Auvergne, CNRS, Clermont-Ferrand, F-63000, France; Faculty of Technology, Department of Environmental Engineering, Tomas Bata University in Zlin, Zlín, 762 72, Czech Republic; Biobasic Environnement, Biopôle Clermont Limagne, Saint-Beauzire, 63360, France
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