Microstructural variations of poly(vinylidene fluoride co-hexafluoropropylene) and their influence on the thermal, dielectric and piezoelectric properties

Ver registo simples
dc.contributor.authorSousa, R. E.por
dc.contributor.authorPereira, J. Nunespor
dc.contributor.authorFerreira, J. C. C.por
dc.contributor.authorCosta, C. M.por
dc.contributor.authorMachado, A. V.por
dc.contributor.authorSilva, M. M.por
dc.contributor.authorLanceros-Méndez, S.por
dc.date.accessioned2015-01-07T08:54:43Z
dc.date.available2015-01-07T08:54:43Z
dc.date.issued2014-12
dc.description.abstractPolymer films and membranes of poly(vinylidene fluoride co-hexafluoropropylene), PVDF-HFP, have been prepared by thermally induced phase separation (TIPS), allowing the tuning of microstructure and morphology. The obtained microstructure is explained by the Flory-Huggins theory, depending on polymer concentration and solvent evaporation temperature. The formation of a porous membrane is attributed to a spinodal decomposition of the liquid-liquid phase separation. The effect of the processing conditions on the morphology, degree of porosity, degree of crystallinity and crystalline polymorph, thermal, dielectric and piezoelectric properties of the PVDF-HFP polymer were evaluated. The crystalline phase and degree of crystallinity depend on the processing conditions and further influence the dielectric and piezoelectric response. The piezoelectric coefficient is correlated with the β-phase content and decreases with decreasing polymer concentration in the initial solution at a given evaporation temperature.por
dc.description.sponsorshipThis work is funded by FEDER funds through the "Programa Operacional Factores de Competitividade - COMPETE" and by national funds from FCT - Fundacao para a Ciencia e a Tecnologia, in the framework of the strategic project Strategic Project PEST-C/FIS/UI607/2011 and PEst-C/QUI/UI0686/2013). The authors also thank funding from Matepro -Optimizing Materials and Processes", ref. NORTE-07-0124-FEDER-000037", co-funded by the "Programa Operacional Regional do Norte" (ON.2 - O Novo Norte), under the "Quadro de Referencia Estrategico Nacional" (QREN), through the "Fundo Europeu de Desenvolvimento Regional" (FEDER), and grants SFRH/BD/66930/2009 (J.N.P.) and SFRH/BD/68499/2010 (C.M.C.). The authors thank Solvay for kindly supplying the high quality materials.por
dc.distributioninternationalpor
dc.identifier.citationSousa, R. E., Nunes-Pereira, J., Ferreira, J. C. C., Costa, C. M., Machado, A. V., Silva, M. M., & Lanceros-Mendez, S. (2014). Microstructural variations of poly(vinylidene fluoride co-hexafluoropropylene) and their influence on the thermal, dielectric and piezoelectric properties. Polymer Testing, 40, 245-255. doi: 10.1016/j.polymertesting.2014.09.012por
dc.identifier.doi10.1016/j.polymertesting.2014.09.012por
dc.identifier.issn0142-9418por
dc.identifier.urihttps://hdl.handle.net/1822/32422
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherElsevierpor
dc.relation.publisherversionhttp://www.sciencedirect.com/science/article/pii/S0142941814002141por
dc.rightsrestrictedAccesspor
dc.subjectPVDF-HFPpor
dc.subjectMembranespor
dc.subjectThermally induced phase separation (TIPS)por
dc.subjectPhase diagrampor
dc.subject.wosScience & Technologypor
dc.titleMicrostructural variations of poly(vinylidene fluoride co-hexafluoropropylene) and their influence on the thermal, dielectric and piezoelectric propertiespor
dc.typearticlepor
dspace.entity.typePublicationen
oaire.citationEndPage255por
oaire.citationStartPage245por
oaire.citationTitlePolymer Testingpor
oaire.citationVolume40por
sdum.journalPolymer Testingpor
sdum.publicationstatuspublishedpor

Ficheiros

Pacote original

A mostrar 1 - 1 de 1
Nome:
HFP_F.pdf
Tamanho:
1.07 MB
Formato:
Adobe Portable Document Format
Descrição:
HFP_F
Descarregar

Coleções

CDF - FCD - Artigos | Articles (with refereeing)