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Título

Ferroelectricity and molecular dynamics of poly(vinylidenefluoride-trifluoroethylene) nanoparticles

AutorMartínez-Tong, Daniel E. ; Soccio, Michelina ; Sanz, A.; García, C.; Ezquerra, Tiberio A. ; Nogales, Aurora
Palabras clavePolymer nanoparticles
Molecular dynamics
Ferroelectric polymers
Fecha de publicación26-nov-2014
EditorElsevier
CitaciónPolymer 56: 428- 434 (2015)
Resumen© 2014 Elsevier Ltd. All rights reserved. Here we show that ferroelectric polymeric nanoparticles of a poly(vinylidene fluoride-trifluoroethylene) random copolymer, can be prepared by dialysis nanoprecipitation. By this method semicrystalline particles with mean diameter of 280 nm, as revealed by atomic force microscopy, can be obtained. The ferroelectric nature at room temperature of the nanoparticles has been proven by piezoresponse force microscopy, differential scanning calorimetry, X-ray diffraction at wide angles and broad band dielectric spectroscopy. The poly(vinylidene fluoride-trifluoroethylene) nanoparticles exhibit a ferroelectric-toparaelectric transition at lower temperature compared with the bulk. In the paraelectric phase the nanoparticles show an intense dielectric relaxation process associated to the rotational motion of the dipoles within the paraelectric crystalline phase. The nature of this dielectric process is similar to that of the bulk.
Descripción7 pags.; 6 figs.; 2 tabs.
Versión del editorhttp://dx.doi.org/10.1016/j.polymer.2014.11.040
URIhttp://hdl.handle.net/10261/128479
DOI10.1016/j.polymer.2014.11.040
Identificadoresdoi: 10.1016/j.polymer.2014.11.040
issn: 0032-3861
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