Enhanced crystallinity through melt annealing of thermoplastic polyurethanes

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dc.authorscopusidGüralp Özkoç / 6602128118
dc.authorwosidGüralp Özkoç / F-7917-2018
dc.contributor.authorAkkoyun, Bahar Durak
dc.contributor.authorWis, Abdulmounem Alchekh
dc.contributor.authorYıldırım, Rümeysa
dc.contributor.authorMakal, Ümit
dc.contributor.authorÖzkoç, Güralp
dc.contributor.authorKodal, Mehmet
dc.date.accessioned2025-04-18T06:51:49Z
dc.date.available2025-04-18T06:51:49Z
dc.date.issued2025
dc.departmentİstinye Üniversitesi, Mühendislik ve Doğa Bilimleri Fakültesi, Kimya Bölümü
dc.description.abstractThis study evaluated the influence of melt annealing on thermoplastic polyurethane (TPU) synthesized via reactive extrusion, aiming to enhance TPU melt crystallization behavior. The melt annealing process involved reprocessing the polymer in a twin-screw extruder, leveraging a novel approach to manipulating crystallization behavior by optimizing melt annealing conditions to activate microphase separation. Differential scanning calorimetry analysis indicated increased nucleation density and a shift in peak crystallization temperature to higher values during cooling. Phase morphology was examined using scanning electron microscopy, while gel permeation chromatography was utilized to assess molecular weight changes. X-ray diffraction provided insights into TPU microstructural modifications, and mechanical properties were evaluated via tensile tests. Fourier-transform infrared spectroscopy was employed to analyze annealing-induced changes in the hard segment structure and interpolymer bonding. The findings demonstrated that annealing enhances mechanical properties, promotes microphase separation, and increases the energy available for movement and realignment of hard segments, thereby improving TPU's thermal stability. Precise control of annealing temperature was critical to prevent adverse effects on polymer morphology or molecular weight reduction. Annealing at 210 degrees C yielded the highest degree of crystallinity, optimizing mechanical properties and thermal stability.
dc.identifier.citationAkkoyun, B. D., Wis, A. A., Yıldırım, R., Makal, Ü., Özkoç, G., & Kodal, M. (2025). Enhanced Crystallinity Through Melt Annealing of Thermoplastic Polyurethanes. Journal of Applied Polymer Science, 142(11), e56593.
dc.identifier.doi10.1002/app.56593
dc.identifier.issn0021-8995
dc.identifier.issn1097-4628
dc.identifier.issue11
dc.identifier.scopus2-s2.0-85212215913
dc.identifier.scopusqualityQ2
dc.identifier.urihttp://dx.doi.org/10.1002/app.56593
dc.identifier.urihttps://hdl.handle.net/20.500.12713/6383
dc.identifier.volume142
dc.identifier.wosWOS:001378192400001
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.institutionauthorÖzkoç, Güralp
dc.institutionauthoridGüralp Özkoç / 0000-0002-3194-5256
dc.language.isoen
dc.publisherJohn wiley and sons inc
dc.relation.ispartofJournal of applied polymer science
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectCrystallinity
dc.subjectMechanical Properties
dc.subjectMelt Annealing
dc.subjectThermoplastic Polyurethane
dc.titleEnhanced crystallinity through melt annealing of thermoplastic polyurethanes
dc.typeArticle

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