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Dielectric properties and thermal conductivity of graphene nanoplatelet filled poly(vinylidene fluoride) (PVDF)/poly(methyl methacrylate) (PMMA) blend

Authors
  • Yang, Dandan1
  • Xu, Haiping1
  • Yu, Wei1
  • Wang, Jingrong1
  • Gong, Xianchen1
  • 1 Shanghai Polytechnic University, School of Environmental and Materials Engineering, 2360 Jinhai RD, Pudong, Shanghai, 201209, People’s Republic of China , Shanghai (China)
Type
Published Article
Journal
Journal of Materials Science Materials in Electronics
Publisher
Springer-Verlag
Publication Date
May 16, 2017
Volume
28
Issue
17
Pages
13006–13012
Identifiers
DOI: 10.1007/s10854-017-7132-y
Source
Springer Nature
Keywords
License
Yellow

Abstract

Poly(methyl methacrylate) (PMMA) and graphene nanoplatelet (GNP) was introduced into poly(vinylidene fluoride) (PVDF) via a solution blending process, and a series of PVDF/PMMA/GNP composites were obtained. Scanning electron microscope (SEM) micrographs of the composite with 4 wt% GNP loading showed that GNP randomly dispersed and partly arranged parallel to each other in the matrix. Fourier transform infrared (FT-IR) spectroscopy results and X-ray diffraction (XRD) analysis revealed the increasing percentage of β- and γ-phase PVDF crystals in the composites with increasing the GNP contents. The frequency dependent electrical conductivity and dielectric properties of composites have been performed in the range of 102 − 107 Hz which obeyed the percolation theory. Dielectric constant and dielectric loss of composites increased with increasing GNP contents in the all frequency region. A dielectric constant of ~148 and dielectric loss of ~0.3 was observed at 102 Hz with 4 wt% of GNP loading, which is near the percolation threshold. Meanwhile, the thermal conductivity reached up to 0.84 W/m K for PVDF/PMMA/GNP composites with 4 wt% of GNP loading. An approch was provided to develop a variety of highly thermally conductive dielectric materials.

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