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Effect of filler size and concentration on the structure and properties of poly(vinylidene fluoride)/BaTiO3 nanocomposites

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Resumo:The effect of filler size and content in the thermal, mechanical and electrical response of poly(vinylidene fluoride) (PVDF)/ BaTiO3 nanocomposites has been investigated. Dielectric constant increases significantly with increasing filler content and decreasing filler size. Space charge effects at the interface between BaTiO3 and PVDF strongly influence the dielectric response. The electroactive -phase of PVDF is nucleated by the presence of the ceramic filler, the effect being strongly dependent on filler size and independent on filler content. This filler/matrix interaction is also responsible for the variations observed in the activation energy of the thermal degradation of the polymer. Smaller particles lead to larger relative contact areas and are responsible for the main variations observed in the thermal, mechanical and electrical properties of the composites.
Autores principais:Mendes, Sérgio Firmino Soares
Outros Autores:Costa, C. M.; Caparrós Vásquez, Cristina Maria; Sencadas, Vítor João Gomes Silva; Lanceros-Méndez, S.
Assunto:Nanocomposites Piezoelectric polymers Piezoelectric ceramics Size effects
Ano:2012
País:Portugal
Tipo de documento:artigo
Tipo de acesso:acesso aberto
Instituição associada:Universidade do Minho
Idioma:inglês
Origem:RepositóriUM - Universidade do Minho

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