The investigation of α→β phase transition in poly(vinylidene fluoride) (PVDF)

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dc.contributor.authorConstantino, C. J L [UNESP]
dc.contributor.authorJob, A. E. [UNESP]
dc.contributor.authorSimões, R. D. [UNESP]
dc.contributor.authorGiacometti, J. A. [UNESP]
dc.contributor.authorZucolotto, V.
dc.contributor.authorOliveira, O. N.
dc.contributor.authorGozzi, G. [UNESP]
dc.contributor.authorChinaglia, D. L. [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.date.accessioned2014-05-27T11:21:44Z
dc.date.available2014-05-27T11:21:44Z
dc.date.issued2005-12-01
dc.description.abstractThe phase transition from the non-polar α-phase to the polar β-phase of poly(vinylidene fluoride) (PVDF) has been investigated using micro-Raman spectroscopy, which is advantageous for being a non-destructive technique. Films of α-PVDF were subjected to stretching under controlled rates and at 80°C, the transition to β-PVDF being monitored by the decrease in the Raman band at 794 cm-1 characteristic of the α-phase, with the concomitant increase in the 839 cm-1 band characteristic of the β-phase. Poling with negative corona discharge was found to affect the a-PVDF morphology improving the Raman bands related to this crystalline phase. This effect is minimized for films stretched to higher ratios. Significantly, corona-induced effects could not be observed with the other experimental techniques, viz. X-ray diffraction and infrared spectroscopy.en
dc.description.affiliationFaculdade de Ciências e Tecnologia UNESP, 19060-900 - Presidente Prudente, SP
dc.description.affiliationInstitute de Física de São Carlos USP, 13566-590 - São Carlos, SP
dc.description.affiliationInstituto de Geociências e Ciência Exatas UNESP, 13500-970 - Rio Claro, SP
dc.description.affiliationUnespFaculdade de Ciências e Tecnologia UNESP, 19060-900 - Presidente Prudente, SP
dc.description.affiliationUnespInstituto de Geociências e Ciência Exatas UNESP, 13500-970 - Rio Claro, SP
dc.format.extent178-181
dc.identifierhttp://ieeexplore.ieee.org/xpl/abstractAuthors.jsp?arnumber=1612350
dc.identifier.citationProceedings - International Symposium on Electrets, v. 2005, p. 178-181.
dc.identifier.lattes6475585105456744
dc.identifier.scopus2-s2.0-33847761025
dc.identifier.urihttp://hdl.handle.net/11449/68617
dc.language.isoeng
dc.relation.ispartofProceedings - International Symposium on Electrets
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectBand structure
dc.subjectNondestructive examination
dc.subjectPolymer films
dc.subjectRaman spectroscopy
dc.subjectVinyl resins
dc.subjectX ray diffraction
dc.subjectBand characteristics
dc.subjectMicro Raman spectroscopy
dc.subjectNon polar phases
dc.subjectRaman bands
dc.subjectPhase transitions
dc.titleThe investigation of α→β phase transition in poly(vinylidene fluoride) (PVDF)en
dc.typeTrabalho apresentado em evento
dcterms.licensehttp://www.ieee.org/publications_standards/publications/rights/rights_policies.html
unesp.author.lattes6475585105456744[2]
unesp.author.lattes6118325967319836[1]
unesp.author.orcid0000-0002-1979-8257[2]
unesp.author.orcid0000-0002-5921-3161[1]
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Ciências e Tecnologia, Presidente Prudentept

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