000120063 001__ 120063
000120063 005__ 20240319081012.0
000120063 0247_ $$2doi$$a10.3390/polym14173466
000120063 0248_ $$2sideral$$a130934
000120063 037__ $$aART-2022-130934
000120063 041__ $$aeng
000120063 100__ $$aKorycki, A.
000120063 245__ $$aEvaluation of fatigue life of recycled opaque PET from household milk bottle wastes
000120063 260__ $$c2022
000120063 5060_ $$aAccess copy available to the general public$$fUnrestricted
000120063 5203_ $$aPolyethylene terephthalate (PET) is among the most used thermoplastic polymers in large scale manufacturing. Opaque PET is increasingly used in milk bottles to save weight and to bring a glossy white aspect due to TiO2 nanoparticles. The recyclability of opaque PET is an issue: whereas the recycling channels are well established for transparent PET, the presence of opaque PET in household wastes weakens those channels: opaque bottles cannot be mixed with transparent ones because the resulting blend is not transparent anymore. Many research efforts focus on the possibility to turn opaque PET into resources, as one key to a more circular economy. A recent study has demonstrated the improvement of the mechanical properties of recycled PET through reactive extrusion. In the present work, the lifespan of recycled opaque PET has been evaluated throughout tensile–tensile fatigue loading cycles at various steps of the recycling process: The specimens are obtained from flakes after grinding PET wastes (F-r-OPET), from a subsequent homogenization step (r-OPET-hom) and after reactive extrusion (Rex-r-OPET). Virgin PET is also considered as a comparison. First, tensile tests monitored by digital image correlation have been carried out to obtain the elastic modulus and ultimate tensile stress of each type of PET. The fatigue properties of reactive REx-r-OPET increase, probably associated with the rise of cross-linking and branching rates. The fatigue lifespan increases with the macromolecular weight. The fracture surface analysis of specimens brings new insight regarding the factors governing the fatigue behavior and the damaging mode of recycled PET. TiO2 nanoparticles act as stress concentrators, contributing to void formation at multiple sites and thus promoting the fracture process. Finally, the fatigue life of REx-r-OPET is comparable to those of virgin PET. Upcycling opaque PET by reactive extrusion may be a relevant new route to absorb some of the growing amounts of PET worldwide.
000120063 536__ $$9info:eu-repo/grantAgreement/EUR/INTERREG POCTEFA-RevalPET'UP-EFA329/19
000120063 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttp://creativecommons.org/licenses/by/3.0/es/
000120063 590__ $$a5.0$$b2022
000120063 592__ $$a0.72$$b2022
000120063 591__ $$aPOLYMER SCIENCE$$b16 / 85 = 0.188$$c2022$$dQ1$$eT1
000120063 593__ $$aPolymers and Plastics$$c2022$$dQ1
000120063 593__ $$aChemistry (miscellaneous)$$c2022$$dQ1
000120063 594__ $$a6.6$$b2022
000120063 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000120063 700__ $$aGarnier, C.
000120063 700__ $$0(orcid)0000-0002-2966-9088$$aIrusta, S.$$uUniversidad de Zaragoza
000120063 700__ $$aChabert, F.
000120063 7102_ $$15005$$2790$$aUniversidad de Zaragoza$$bDpto. Ing.Quím.Tecnol.Med.Amb.$$cÁrea Tecnologi. Medio Ambiente
000120063 773__ $$g14, 17 (2022), 3466[16 pp.]$$pPolymers (Basel)$$tPolymers$$x2073-4360
000120063 8564_ $$s5665288$$uhttps://zaguan.unizar.es/record/120063/files/texto_completo.pdf$$yVersión publicada
000120063 8564_ $$s2640850$$uhttps://zaguan.unizar.es/record/120063/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000120063 909CO $$ooai:zaguan.unizar.es:120063$$particulos$$pdriver
000120063 951__ $$a2024-03-18-15:15:18
000120063 980__ $$aARTICLE