Assessment of antioxidant performance of silybum marianum extract as a natural antioxidant additive in polyethylene by time-dependent melt rheology tests

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dc.authorid0000-0002-9029-7324
dc.authorid0000-0002-8738-3424
dc.authorid0000-0002-3733-478X
dc.authorid0000-0002-5037-1120
dc.contributor.authorAlanalp, Mine Begüm
dc.contributor.authorŞıdım, Gizem
dc.contributor.authorMirmahmutoğulları, Esra
dc.contributor.authorPınar, Özlem
dc.contributor.authorDurmuş, Ali
dc.date.accessioned2026-04-14T11:46:13Z
dc.date.available2026-04-14T11:46:13Z
dc.date.issued2026
dc.departmentFakülteler, Mühendislik ve Doğa Bilimleri Fakültesi, Kimya Mühendisliği Bölümü
dc.description.abstractIn this study, Silybum marianum (SM) extract as a natural primary antioxidant (PAO) additive was introduced into low density polyethylene. This primary antioxi dant was supported by a commercial grade secondary antioxidant (SAO, Irgafos® 168). The effect of compositional variations, mainly amount of SM and the weight ratio of PAO: SAO in the composition, on the thermooxidative stability of low density polyethylene (LDPE) was characterized by determining the thermal param eters, oxygen induction time (OIT) and oxidation onset temperature (OOT) using conventional thermal analysis methods performed in a DSC in air atmosphere. Fur thermore, time-dependent rheology test procedures were suggested for monitoring the thermooxidative degradation behavior of antioxidant-loaded compounds. It was found that SM loading of 0.2 or 0.5 wt% provided sufficient oxidation stability in polyethylene, at least 5 min at 240 °C under air when supported by introducing two- or three-fold of SAO. It can be concluded that these SM-Irgafos® 168 antioxi dant packages can be successfully used in polyethylenes processed in conventional melt processing windows that can be varied in 180–240 °C, in processing devices (e.g., compounder, kneader, extruders, injection molding, rotomolding) because the obtained thermorheooxidative stability times are longer than the residence time of polymer melts, approximately in the range of 1–4 min from the melting zone to die during the extrusion process.
dc.description.sponsorshipOpen access funding provided by the Scientific and Technological Research Council of Türkiye (TÜBİTAK). Türkiye Bilim ve Teknolojik Araştırma Konseyi (TÜBİTAK) tarafından sağlanan açık erişim fonu.
dc.identifier.citationAlanalp, M. B., Şıdım, G., Mirmahmutoğulları, E., Pınar, Ö., & Durmuş, A. (2026). Assessment of antioxidant performance of silybum marianum extract as a natural antioxidant additive in polyethylene by time-dependent melt rheology tests. Polymer Bulletin, 83(6), pp. 1-17. https://doi.org/10.1007/s00289-026-06353-1
dc.identifier.doi10.1007/s00289-026-06353-1
dc.identifier.endpage17
dc.identifier.issn1436-2449
dc.identifier.issn0170-0839
dc.identifier.issue6
dc.identifier.scopus2-s2.0-105033404987
dc.identifier.scopusqualityQ1
dc.identifier.startpage1
dc.identifier.urihttps://doi.org/10.1007/s00289-026-06353-1
dc.identifier.urihttps://hdl.handle.net/20.500.13055/1405
dc.identifier.volume83
dc.identifier.wosWOS:001715902600001
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.indekslendigikaynakPubMed
dc.indekslendigikaynak.otherSCI-E - Science Citation Index Expanded
dc.institutionauthorAlanalp, Mine Begüm
dc.institutionauthorid0000-0002-9029-7324
dc.language.isoen
dc.publisherSpringer Nature Link
dc.relation.ispartofPolymer Bulletin
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectSilybum Marianum
dc.subjectNatural Antioxidant
dc.subjectPolyethylene
dc.subjectRheology
dc.subjectCreep
dc.titleAssessment of antioxidant performance of silybum marianum extract as a natural antioxidant additive in polyethylene by time-dependent melt rheology tests
dc.typeArticle
dspace.entity.typePublication

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