Thermal and thermo-oxidative stability of reprocessed poly(ethylene terephthalate)
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Thermal and thermo-oxidative stability of reprocessed poly(ethylene terephthalate)

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Thermal and thermo-oxidative stability of reprocessed poly(ethylene terephthalate)

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dc.contributor.author Badia Valiente, José David
dc.contributor.author Martínez-Felipe, A.
dc.contributor.author Santonja-Blasco, L.
dc.contributor.author Ribes Greus, A.
dc.date.accessioned 2019-10-23T13:45:01Z
dc.date.available 2019-10-23T13:45:01Z
dc.date.issued 2012
dc.identifier.uri https://hdl.handle.net/10550/71800
dc.description.abstract An exhaustive assessment of the behaviour of virgin and mechanically reprocessed poly(ethylene terephthalate) (PET) facing thermal and thermo-oxidative decomposition processes is presented in this work, as an approach for the energetic valorisation of post-consumer PET goods. Multi-rate linear-non-isothermal thermogravimetric (TGA) experiments under inert (Ar) and reactive (O2) conditions were performed to virgin PET and its recyclates in order to simulate the thermal behaviour of the materials facing pyrolysis and combustion processes. The release of gases was monitored by evolved gas analysis of the fumes of the TGA experiment, by in-line Fourier-transform infrared (IR) analysis, with the aid of 2D-correlation IR characterisation. A kinetic analysis methodology, consisting in the combination of six different methods (namely Flynn-Wall-Ozawa, Kissinger-Akahira-Sunose, Vyazovkin, Master-Curves and Perez-Maqueda criterion along with Coats-Redfern equation) was applied. Its validity for being used for both constant and variable kinetic parameters was discussed. The kinetic model that described both thermal and thermo-oxidative decompositions of PET and its recyclates was of the type An: nucleation and growth of gas bubbles in the melt. Novel parameters and functions were proposed to characterise the thermal stability along the reprocessing cycles, as well as the variation of the activation energy and the pre-exponential factor during thermal and thermo-oxidative decompositions. The reliability of a simplified kinetic triplet with constant activation parameters was suitable only under thermal decomposition. The usability of PET after reprocessing showed a threshold in the thermal performance from the second recyclate on. During thermal and thermo-oxidative processes, reprocessed PET behaved similarly to virgin PET, and thus current energetic valorisation technologies could be assimilable for all materials.
dc.language.iso eng
dc.relation.ispartof Journal of Analytical and Applied Pyrolysis, 2012, vol. 99, p. 191-202
dc.rights.uri info:eu-repo/semantics/openAccess
dc.source Badia Valiente, José David Martínez-Felipe, A. Santonja-Blasco, L. Ribes Greus, A. 2012 Thermal and thermo-oxidative stability of reprocessed poly(ethylene terephthalate) Journal of Analytical and Applied Pyrolysis 99 191 202
dc.subject Termoplàstics
dc.subject Ciència dels materials
dc.title Thermal and thermo-oxidative stability of reprocessed poly(ethylene terephthalate)
dc.type info:eu-repo/semantics/article
dc.date.updated 2019-10-23T13:45:02Z
dc.identifier.doi https://doi.org/10.1016/j.jaap.2012.09.003
dc.identifier.idgrec 134918

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