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

dc.contributor.coauthorWilkes, Garth L.
dc.contributor.coauthorZhang, Mingqiang
dc.contributor.departmentDepartment of Chemistry
dc.contributor.departmentGraduate School of Sciences and Engineering
dc.contributor.kuauthorErtem, S. Pırıl
dc.contributor.kuauthorSöz, Çağla
dc.contributor.kuauthorYılgör, Emel
dc.contributor.kuauthorYılgör, İskender
dc.contributor.schoolcollegeinstituteCollege of Sciences
dc.contributor.schoolcollegeinstituteGRADUATE SCHOOL OF SCIENCES AND ENGINEERING
dc.date.accessioned2024-11-09T23:37:15Z
dc.date.issued2012
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 <M-n> 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 (M-e) 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 (M-n) greater than M-e, 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. (c) 2012 Elsevier Ltd. All rights reserved.
dc.description.indexedbyWOS
dc.description.indexedbyScopus
dc.description.issue21
dc.description.openaccessNO
dc.description.publisherscopeInternational
dc.description.sponsoredbyTubitakEuN/A
dc.description.sponsorshipDirect For Mathematical & Physical Scien
dc.description.sponsorshipDivision of Materials Research [0923107] Funding Source: National Science Foundation
dc.description.volume53
dc.identifier.doi10.1016/j.polymer.2012.08.020
dc.identifier.eissn1873-2291
dc.identifier.issn0032-3861
dc.identifier.quartileQ1
dc.identifier.scopus2-s2.0-84866365954
dc.identifier.urihttps://doi.org/10.1016/j.polymer.2012.08.020
dc.identifier.urihttps://hdl.handle.net/20.500.14288/12775
dc.identifier.wos309377400007
dc.keywordsPolyurethaneurea elastomer
dc.keywordsHysteresis
dc.keywordsEntanglements copolymers
dc.keywordsEntanglements
dc.keywordsElastomers
dc.keywordsBehavior
dc.language.isoeng
dc.publisherElsevier
dc.relation.ispartofPolymer
dc.subjectPolymer science
dc.titleEffect of soft segment molecular weight on tensile properties of poly(propylene oxide) based polyurethaneureas
dc.typeJournal Article
dspace.entity.typePublication
local.contributor.kuauthorErtem, S. Pırıl
local.contributor.kuauthorYılgör, Emel
local.contributor.kuauthorSöz, Çağla Koşak
local.contributor.kuauthorYılgör, İskender
local.publication.orgunit1GRADUATE SCHOOL OF SCIENCES AND ENGINEERING
local.publication.orgunit1College of Sciences
local.publication.orgunit2Department of Chemistry
local.publication.orgunit2Graduate School of Sciences and Engineering
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