The role of crystalline, mobile amorphous and rigid amorphous fractions in the performance of recycled poly (ethylene terephthalate) (PET)
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The role of crystalline, mobile amorphous and rigid amorphous fractions in the performance of recycled poly (ethylene terephthalate) (PET)

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The role of crystalline, mobile amorphous and rigid amorphous fractions in the performance of recycled poly (ethylene terephthalate) (PET)

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dc.contributor.author Badia Valiente, José David
dc.contributor.author Strömberg, E.
dc.contributor.author Karlsson, S.
dc.contributor.author Ribes Greus, A.
dc.date.accessioned 2019-10-22T14:27:41Z
dc.date.available 2019-10-22T14:27:41Z
dc.date.issued 2012
dc.identifier.uri https://hdl.handle.net/10550/71792
dc.description.abstract The action of thermo-mechanical degradation induced by mechanical recycling of poly(ethylene terephthalate) was simulated by successive injection moulding cycles. Degradation reactions provoked chain scissions and a reduction in molar mass mainly driven by the reduction of diethyleneglycol to ethylene glycol units in the flexible domain of the PET backbone, and the formation of -OH terminated species with shorter chain length. The consequent microstructural changes were quantified taking into account a three-fraction model involving crystalline, mobile amorphous (MAF) and rigid amorphous fractions (RAF). A remarkable increase of RAF, to a detriment of MAF was observed, while the percentage of crystalline fraction remained nearly constant. A deeper analysis of the melting behaviour, the segmental dynamics around the glass-rubber relaxation, and the macroscopic mechanical performance, showed the role of each fraction leading to a loss of thermal, viscoelastic and mechanical features, particularly remarkable after the first processing cycle.
dc.language.iso eng
dc.relation.ispartof Polymer Degradation and Stability, 2011, vol. 97, num. 1, p. 98-107
dc.rights.uri info:eu-repo/semantics/openAccess
dc.source Badia Valiente, José David Strömberg, E. Karlsson, S. Ribes Greus, A. 2011 The role of crystalline, mobile amorphous and rigid amorphous fractions in the performance of recycled poly (ethylene terephthalate) (PET) Polymer Degradation and Stability 97 1 98 107
dc.subject Termoplàstics
dc.subject Solucions polimèriques
dc.title The role of crystalline, mobile amorphous and rigid amorphous fractions in the performance of recycled poly (ethylene terephthalate) (PET)
dc.type info:eu-repo/semantics/article
dc.date.updated 2019-10-22T14:27:41Z
dc.identifier.doi https://doi.org/10.1016/j.polymdegradstab.2011.10.008
dc.identifier.idgrec 134913

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