Dielectric relaxation of vegetable-based polyurethane

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dc.contributor.authorSakamoto, W. K.
dc.contributor.authorKanda, DHF
dc.contributor.authorAndrade, F. D.
dc.contributor.authorDas-Gupta, D. K.
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniv Wales
dc.date.accessioned2014-05-20T13:29:32Z
dc.date.available2014-05-20T13:29:32Z
dc.date.issued2003-04-01
dc.description.abstractVegetable-based polyurethane (PU) was prepared in the thin film form by spin coating. This polymer is synthesised from castor oil, which can be extracted from the seeds of a native plant in Brazil called mamona. This polymer is biocompatible and is being used as material for artificial bone. The PU was characterised by dielectric spectroscopy in a wide range of frequency (10(-5) Hz to 10(5) Hz) and by thermally stimulated discharge current (TSDC) measurements. The glass transition temperature (T-g=39degreesC) was determined and using the initial rise method the activation energy was found to be 1.58 eV. (C) 2003 Kluwer Academic Publishers.en
dc.description.affiliationUniv Estadual Paulista, Dept Quim & Fis, BR-153850 Ilha Solteira, SP, Brazil
dc.description.affiliationUniv Wales, Sch Informat, Bangor LL57 1UT, Gwynedd, Wales
dc.description.affiliationUnespUniv Estadual Paulista, Dept Quim & Fis, BR-153850 Ilha Solteira, SP, Brazil
dc.format.extent1465-1470
dc.identifierhttp://dx.doi.org/10.1023/A:1022912312657
dc.identifier.citationJournal of Materials Science. Dordrecht: Kluwer Academic Publ, v. 38, n. 7, p. 1465-1470, 2003.
dc.identifier.doi10.1023/A:1022912312657
dc.identifier.issn0022-2461
dc.identifier.lattes0896348165708140
dc.identifier.lattes4802713321439692
dc.identifier.urihttp://hdl.handle.net/11449/9987
dc.identifier.wosWOS:000181767700013
dc.language.isoeng
dc.publisherKluwer Academic Publ
dc.relation.ispartofJournal of Materials Science
dc.relation.ispartofjcr2.993
dc.relation.ispartofsjr0,807
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.titleDielectric relaxation of vegetable-based polyurethaneen
dc.typeArtigo
dcterms.licensehttp://www.springer.com/open+access/authors+rights
dcterms.rightsHolderKluwer Academic Publ
unesp.author.lattes0896348165708140
unesp.author.lattes4802713321439692
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Engenharia, Ilha Solteirapt
unesp.departmentFísica e Química - FEISpt

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Ilha Solteira - FEIS - Faculdade de Engenharia