Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/34956
Title: Novel syndiotactic polystyrene/BaTiO3-graphite nanosheets three-phase composites with high dielectric permittivity
Authors: He, FA
Lam, KH
Fan, JT
Chan, LW 
Keywords: Graphite nanosheets
Syndiotactic polystyrene
BaTiO3
Polymer-matrix composites
High dielectric permittivity
Issue Date: 2013
Publisher: Elsevier
Source: Polymer testing, 2013, v. 32, no. 5, p. 927-931 How to cite?
Journal: Polymer testing
Abstract: Novel three-phase composites were prepared by embedding graphite nanosheets (GNs) and BaTiO3 nanoparticles into syndiotactic polystyrene (sPS) matrix via a solution blending and flocculation method. The dependences of electric and dielectric properties of the resultant sPS/BaTiO3-GNs composites on volume fractions of GNs (fGNs) and frequency were investigated. The percolation theory was employed to explain the electric and dielectric behavior of sPS/BaTiO3-GNs composite. It was found that the sPS/BaTiO3-GNs composite showed an obvious insulator-conductor transition with a much low percolation threshold of fGNs = 1.44 vol%. The dielectric permittivity of sPS/BaTiO3-GNs composite reached as high as 51.8 at 100 Hz at percolation threshold, which was about 18 and 7 times higher than that of pure sPS and sPS/BaTiO3 composite, respectively.
URI: http://hdl.handle.net/10397/34956
ISSN: 0142-9418 (print)
1873-2348 (electronic)
DOI: 10.1016/j.polymertesting.2013.05.002
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