Effect of soft segment molecular weight on tensile properties of poly(propylene oxide) based polyurethaneureas

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dc.authorid0000-0003-3942-070X
dc.contributor.authorErtem, Sedef Pırıl
dc.contributor.authorYılgör, Emel
dc.contributor.authorSöz, Çağla
dc.contributor.authorWilkes, Garth L.
dc.contributor.authorZhang, Mingqiang
dc.contributor.authorYılgör, İskender
dc.date.accessioned2021-03-30T09:02:03Z
dc.date.available2021-03-30T09:02:03Z
dc.date.issued2012
dc.departmentTAÜ, Fen Fakültesi, Malzeme Bilimi ve Teknolojileri Bölümüen_US
dc.description.abstractInfluence of soft segment molecular weight and hard segment content on the morphology, thermomechanical and tensile properties of homologous polyurethaneurea copolymers based on narrow molecular weight poly(propylene oxide)glycol (PPG) oligomers were investigated. A series of polyurethaneureas with hard segment contents of 12–45% by weight and PPG number average molecular weights <Mn> of 2000 to 11,800 g/mol were synthesized and characterized structurally by SAXS and mechanically by DMA and stress strain analysis. Bis(4-isocyanatocyclohexyl)methane and 2-methyl-1,5-diaminopentane were used as the diisocyanate and the chain extender respectively. All copolymers displayed microphase separation by SAXS and DMA. The critical entanglement molecular weight (Me) of PPG is reported to be around 7700 g/mol. Our mechanical results suggest that when copolymers possess similar hard segment contents and are compared to those based on soft segments with number average molecular weights (Mn) greater than Me, they generally displayed higher tensile strengths and particularly lower hysteresis and creep than those having soft segment molecular weights below Me. These results imply that soft segment entanglements in thermoplastic polyurethaneureas may provide a critical contribution to the tensile properties of these copolymers – particularly in the range where the soft segment content is dominant.
dc.identifier.citationErtem, S. P., Yılgör, E., Koşak Söz, Ç., Wilkes, G. L., Zhang, M., & Yılgör, İ. (2012). Effect of soft segment molecular weight on tensile properties of poly (propylene oxide) based polyurethaneureas. Polymer, 53(21), 4614-4622.
dc.identifier.doi10.1016/j.polymer.2012.08.020
dc.identifier.endpage4622en_US
dc.identifier.issn0032-3861
dc.identifier.issue21en_US
dc.identifier.scopusqualityQ1
dc.identifier.startpage4614en_US
dc.identifier.urihttps://hdl.handle.net/20.500.12846/565
dc.identifier.volume53en_US
dc.institutionauthorSöz, Çağla
dc.language.isoen
dc.publisherElsevier
dc.relation.ispartofPolymer
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectPolyurethaneurea Elastomeren_US
dc.subjectHysteresisen_US
dc.subjectEntanglementsen_US
dc.subjectPoliüretanüre Elastomeren_US
dc.subjectHisterezisen_US
dc.subjectPolyurethanharnstoff Elastomeren_US
dc.subjectHystereseen_US
dc.titleEffect of soft segment molecular weight on tensile properties of poly(propylene oxide) based polyurethaneureas
dc.typeArticle

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