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Effect of polyol excess on the electrical property of vegetable-polyurethane film

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dc.contributor.authorKanda, D. H. F. [UNESP]
dc.contributor.authorNagashima, Haroldo Naoyuki [UNESP]
dc.contributor.authorMalmonge, J. A. [UNESP]
dc.contributor.authorSakamoto, W. K. [UNESP]
dc.contributor.authorChierice, G. O.
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.date.accessioned2014-05-20T13:29:49Z
dc.date.available2014-05-20T13:29:49Z
dc.date.issued2008-08-01
dc.description.abstractFreestanding castor oil-based polyurethane (PU) film was obtained using spin-coating method. The effect of polyol content was analysed by means of thermally stimulated depolarisation current and AC dielectric measurements techniques. Two relaxation peaks were observed in the temperature range of -40 to 60 degrees C for PU with different polyol contents. The presence of polyol excess provides a shift to lower temperature of the a relaxation and the decrease in the activation energy of the transition in this region might be attributed to the plasticising effect of the polyol. The peak at higher temperature is due to the Maxwell-Wagner-Sillars relaxation, which also shifts in the low temperature direction as the polyol content is increased.en
dc.description.affiliationUniv São Paulo State, UNESP, Dept Chem & Phys, BR-15385000 Ilha Solteira, SP, Brazil
dc.description.affiliationUniv São Paulo, Inst Chem, São Carlos, SP, Brazil
dc.description.affiliationUnespUniv São Paulo State, UNESP, Dept Chem & Phys, BR-15385000 Ilha Solteira, SP, Brazil
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.format.extent5436-5440
dc.identifierhttp://dx.doi.org/10.1007/s10853-008-2843-3
dc.identifier.citationJournal of Materials Science. New York: Springer, v. 43, n. 16, p. 5436-5440, 2008.
dc.identifier.doi10.1007/s10853-008-2843-3
dc.identifier.issn0022-2461
dc.identifier.lattes4802713321439692
dc.identifier.lattes0607115205166943
dc.identifier.lattes0896348165708140
dc.identifier.urihttp://hdl.handle.net/11449/10102
dc.identifier.wosWOS:000258573900003
dc.language.isoeng
dc.publisherSpringer
dc.relation.ispartofJournal of Materials Science
dc.relation.ispartofjcr2.993
dc.relation.ispartofsjr0,807
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.titleEffect of polyol excess on the electrical property of vegetable-polyurethane filmen
dc.typeArtigo
dcterms.licensehttp://www.springer.com/open+access/authors+rights?SGWID=0-176704-12-683201-0
dcterms.rightsHolderSpringer
unesp.author.lattes4802713321439692
unesp.author.lattes0607115205166943
unesp.author.lattes0896348165708140
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