Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/22697

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dc.contributor.authorMartins, P.-
dc.contributor.authorCosta, Carlos M.-
dc.contributor.authorFerreira, José Carlos-
dc.contributor.authorLanceros-Méndez, S.-
dc.date.accessioned2013-01-17T18:02:49Z-
dc.date.available2013-01-17T18:02:49Z-
dc.date.issued2012-01-19-
dc.identifier.issn1520-6106por
dc.identifier.urihttp://hdl.handle.net/1822/22697-
dc.description.abstractPoly(vinylidene fluoride) (PVDF) nanocomposites with different ferrite nanoparticle loadings are interesting as, depending on ferrite type and content, the electroactive β-phase of the polymer is nucleated and the magnetoelectric coupling is induced. The isothermal crystallization behavior of ferrite/PVDF nanocomposites is studied using Polarized Optical Microscopy and the crystallization kinetic is analyzed by the Avrami theory in order to understand the crystallization conditions leading to the nucleation of the electroactive polymer phase. It is found that the nucleation kinetics is enhanced by the presence of ferrite nanoparticles, as evidenced by the increasing number of spherulites with increasing nanoparticle content and by the variations of the Avrami exponent. The crystallization velocity is intimately related to the polymer α- or β−phase formation in the nanocomposites and follows the order: NiFe2O4/PVDF > CoFe2O4/PVDF> Ni0.5Zn0.5Fe2O4/PVDF for a given temperature and nanoparticle loading, which results in larger amounts of β-phase for CoFe2O4/PVDF and Ni0.5Zn0.5Fe2O4/PVDF nanocomposites.por
dc.description.sponsorshipWe acknowledge the Foundation for Science and Technology (FCT) for finantial support through PTDC/CTM/69316/2006, PTDC/CTM-NAN/112574/2009, and NANO/NMed-SD/0156/2007 projects. P.M. and C.M.C. thank the support of the FCT (grant SFRH/BD/45265/2008 and SFRH/BD/68499/2010). We also thank the support from the COST Action MP1003, 2010 'European Scientific Network for Artificial Muscles'.por
dc.language.isoengpor
dc.publisherAmerican Chemical Societypor
dc.rightsrestrictedAccesspor
dc.subjectAvramipor
dc.subjectβ-phase nucleationpor
dc.subjectCrystallization behaviorpor
dc.subjectPVDFpor
dc.subjectFerritespor
dc.subjectMagnetoelectricpor
dc.titleCorrelation between crystallization kinetics and electroactive polymer phase nucleation in ferrite/poly(vinylidene fluoride) magnetoelectric nanocompositespor
dc.typearticlepor
dc.peerreviewedyespor
dc.relation.publisherversionhttp://pubs.acs.org/doi/pdf/10.1021/jp210493tpor
sdum.publicationstatuspublishedpor
oaire.citationStartPage794por
oaire.citationEndPage801por
oaire.citationIssue2por
oaire.citationTitleJournal of Physical Chemistry Bpor
oaire.citationVolume116por
dc.identifier.doi10.1021/jp210493tpor
dc.subject.wosScience & Technologypor
sdum.journalJournal of Physical Chemistry B por
Appears in Collections:CDF - FCD - Artigos/Papers (with refereeing)

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