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Correlation between rotational molding process temperature and degradation changes of polyethylene and composites containing coffee spent grounds used as an active filler

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cris.virtual.author-orcid0000-0003-0989-1586
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cris.virtualsource.author-orcid0e9d858b-df05-406c-b66c-8c6566bab2d1
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dc.abstract.enApart from developing novel polymeric compositions, industrially oriented research should consider the critical impact of processing parameters on the structure and properties of final products. It is of vital importance, especially in the case of multithreaded processing, taking into account both the influence of individual raw materials and the process parameters, which may noticeably affect them in situ. Herein, the presented work quantifies the impact of rotational molding (RM) conditions on degradation mechanisms in low-density polyethylene (LDPE) and LDPE-based composites. The experimental technological tests were performed at 200, 225, and 250 °C temperature sets. The influence of different conditions affecting the outer layers of the product (overheating) and inner walls (thermo-oxidation) was analyzed. The polymeric composite was produced using coffee spent grounds (CSG), a waste-based filler rich in active antioxidant compounds, which makes the final material a potential self-stabilizing composite. After processing, samples taken from rotational molded parts were exposed to UV light on the external and internal walls of the product to intensify selected groups of degradation phenomena and to separate the effects resulting from the degradation of the lignocellulosic filler itself, the polymer matrix, and the passivation of active compounds contained in the CSG. Studies have shown that the introduction of 5 wt% CSG, regardless of the degree of degradation of the filler's lignocellulosic structure, did not significantly affect the limitations of stabilization efficiency resulting from the passivation of polyphenolic active compounds. The protection factor (PF), calculated based on oxidation induction time (OIT), decreased by 5 to 23 %, depending on the sample mass, as a result of using a maximum temperature set of 250 °C.
dc.affiliationWydział Leśny i Technologii Drewna
dc.affiliation.instituteKatedra Chemii
dc.affiliation.instituteKatedra Chemicznej Technologii Drewna
dc.contributor.authorBarczewski, Mateusz
dc.contributor.authorAniśko-Michalak, Joanna
dc.contributor.authorSkórczewska, Katarzyna
dc.contributor.authorManiak, Mateusz
dc.contributor.authorKosmela, Paulina
dc.contributor.authorŻukowska, Wiktoria
dc.contributor.authorPrzybylska-Balcerek, Anna
dc.contributor.authorSzwajkowska-Michałek, Lidia
dc.contributor.authorStuper-Szablewska, Kinga
dc.contributor.authorWaliszewska, Bogusława
dc.contributor.authorZborowska, Magdalena
dc.contributor.authorSzulc, Joanna
dc.contributor.authorHejna, Aleksander
dc.date.access2025-10-08
dc.date.accessioned2025-10-08T07:18:45Z
dc.date.available2025-10-08T07:18:45Z
dc.date.copyright2025-09-14
dc.date.issued2025-09-06
dc.description.accesstimeat_publication
dc.description.bibliographyil., bibliogr.
dc.description.financepublication_nocost
dc.description.financecost0,00
dc.description.if9,2
dc.description.numberDecember 2025
dc.description.points200
dc.description.versionfinal_published
dc.description.volume46
dc.identifier.doi10.1016/j.susmat.2025.e01652
dc.identifier.issn2214-9937
dc.identifier.urihttps://sciencerep.up.poznan.pl/handle/item/5274
dc.identifier.weblinkhttps://www.sciencedirect.com/science/article/pii/S2214993725004208
dc.languageen
dc.pbn.affiliationforestry
dc.relation.ispartofSustainable Materials and Technologies
dc.relation.pagese01652
dc.rightsCC-BY
dc.sciencecloudnosend
dc.share.typeOTHER
dc.subject.enpolyethylene
dc.subject.enprocess degradation
dc.subject.enrotational molding
dc.subject.enactive filler
dc.subject.enself-stabilizing composites
dc.subject.encoffee spent grounds
dc.titleCorrelation between rotational molding process temperature and degradation changes of polyethylene and composites containing coffee spent grounds used as an active filler
dc.typeJournalArticle
dspace.entity.typePublication
oaire.citation.volume46