Abstract : Nanocomposites based on poly (vinylidene fluoride) (PVDF) and expanded graphite (EG) were prepared by non-solvent precipitation from solution with different EG concentrations. Films were obtained by compression molding and their structural and dielectric properties studied. From Wide Angle X-ray Scattering (WAXS) experiments, it can be assessed that for all EG concentrations the -crystalline phase of PVDF is the predominant crystalline form. However, for composites with high nanoadditive content, higher than 3 wt.%, the -crystalline phase is also detected. Dielectric spectroscopy results showed that the nanocomposites present both high dielectric constant and electrical conductivity at low percolation threshold.
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Submitted on : Thursday, February 12, 2015 - 11:23:09 AM Last modification on : Wednesday, January 13, 2021 - 3:13:27 AM Long-term archiving on: : Saturday, September 12, 2015 - 11:10:18 AM
A Linares, J C Canalda, A Sanz, A Szymczyk, Z Rosłaniec, et al.. Broadband dielectric spectroscopy of nanocomposites based on PVDF and expanded graphite. IOP Conference Series: Materials Science and Engineering, IOP Publishing, 2014, 64, pp.012003. ⟨10.1088/1757-899X/64/1/012003⟩. ⟨hal-01115969⟩