He, F.-A., Lam, K.-H. , Fan, J.-T. and Chan, L.-W. (2013) Novel syndiotactic polystyrene/BaTiO3-graphite nanosheets three-phase composites with high dielectric permittivity. Polymer Testing, 32(5), pp. 927-931. (doi: 10.1016/j.polymertesting.2013.05.002)
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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.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Lam, Dr Koko |
| Authors: | He, F.-A., Lam, K.-H., Fan, J.-T., and Chan, L.-W. |
| College/School: | College of Science and Engineering > School of Engineering > Systems Power and Energy |
| Journal Name: | Polymer Testing |
| Publisher: | Elsevier |
| ISSN: | 0142-9418 |
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