Novel syndiotactic polystyrene/BaTiO3-graphite nanosheets three-phase composites with high dielectric permittivity

Fu An He; Kwok Ho Lam; Jin Tu Fan; Lai Wa Chan

doi:10.1016/j.polymertesting.2013.05.002

Novel syndiotactic polystyrene/BaTiO₃-graphite nanosheets three-phase composites with high dielectric permittivity

Fu An He, Kwok Ho Lam, Jin Tu Fan, Lai Wa Chan

The Hong Kong Polytechnic University

Research output: Journal article publication › Journal article › Academic research › peer-review

34 Citations (Scopus)

Abstract

Abstract Novel three-phase composites were prepared by embedding graphite nanosheets (GNs) and BaTiO3nanoparticles 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/BaTiO3composite, respectively.

Original language	English
Pages (from-to)	927-931
Number of pages	5
Journal	Polymer Testing
Volume	32
Issue number	5
DOIs	https://doi.org/10.1016/j.polymertesting.2013.05.002
Publication status	Published - 3 Jun 2013

Keywords

Keywords Graphite nanosheets Syndiotactic polystyrene BaTiO Polymer-matrix composites High dielectric permittivity 3

ASJC Scopus subject areas

Organic Chemistry
Polymers and Plastics

More information

10.1016/j.polymertesting.2013.05.002

Cite this

@article{15092eaec32e47949b5c87d2d82ca244,

title = "Novel syndiotactic polystyrene/BaTiO3-graphite nanosheets three-phase composites with high dielectric permittivity",

abstract = "Abstract Novel three-phase composites were prepared by embedding graphite nanosheets (GNs) and BaTiO3nanoparticles 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/BaTiO3composite, respectively.",

keywords = "Keywords Graphite nanosheets Syndiotactic polystyrene BaTiO Polymer-matrix composites High dielectric permittivity 3",

author = "He, {Fu An} and Lam, {Kwok Ho} and Fan, {Jin Tu} and Chan, {Lai Wa}",

year = "2013",

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T1 - Novel syndiotactic polystyrene/BaTiO3-graphite nanosheets three-phase composites with high dielectric permittivity

AU - He, Fu An

AU - Lam, Kwok Ho

AU - Fan, Jin Tu

AU - Chan, Lai Wa

PY - 2013/6/3

Y1 - 2013/6/3

N2 - Abstract Novel three-phase composites were prepared by embedding graphite nanosheets (GNs) and BaTiO3nanoparticles 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/BaTiO3composite, respectively.

AB - Abstract Novel three-phase composites were prepared by embedding graphite nanosheets (GNs) and BaTiO3nanoparticles 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/BaTiO3composite, respectively.

KW - Keywords Graphite nanosheets Syndiotactic polystyrene BaTiO Polymer-matrix composites High dielectric permittivity 3

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DO - 10.1016/j.polymertesting.2013.05.002

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JO - Polymer Testing

JF - Polymer Testing

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