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

Research output: Journal article publicationJournal articleAcademic researchpeer-review

26 Citations (Scopus)


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 languageEnglish
Pages (from-to)927-931
Number of pages5
JournalPolymer Testing
Issue number5
Publication statusPublished - 3 Jun 2013


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

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics

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