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Dielectric properties of doped polystyrene and polymethylmethacrylate

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Abstract

About 1 μm thick films of polystyrene (PS) and polymethylmethacrylate (PMMA) doped with diphenylsulfoxide (DS) up to 40 wt.% were prepared from solutions using spin-coating method. Glass transition temperature (T g) of doped polymer films was determined by DSC technique. The depth profile and surface concentration of DS dopant were measured by RBS and XPS methods, respectively. The temperature dependence of relative permittivity of the films was determined from capacitance measurement. The dependence of polarization (P) on electric field (E) was measured using a standard Sawyer–Tower circuit. The glass transition temperature T g of both composites was found to be decreasing function of the DS concentration. The DS doping leads to an increase of relative permittivity of the PS and PMMA films. RBS and XPS measurements reveal an outward diffusion of DS dopant in PS/DS films at elevated temperature. No such effect was observed in PMMA/DS films. PMMA/DS layers were found to be more thermally stable comparing to PS/DS.

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Acknowledgements

This work was supported by grant of ICT Prague No. 126080016/2005 and by Grant Agency of the CR under the projects Nos. 102/06/1106 and 204/06/0225 and Ministry of Education of the CR under Research program No. 6046137302.

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Authors and Affiliations

  1. Department of Solid State Engineering, Institute of Chemical Technology, 166 28, Prague, Czech Republic

    Tomasz Podgrabinski & Vaclav Švorčík

  2. Nuclear Physics Institute, Academy of Sciences of the Czech Republic, 250 68, Řež, Czech Republic

    Anna Macková & Vladimir Hnatowicz

  3. Department of Power Engineering, Institute of Chemical Technology, 166 28, Prague, Czech Republic

    Petr Sajdl

Authors
  1. Tomasz Podgrabinski
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  2. Vaclav Švorčík
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  3. Anna Macková
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  4. Vladimir Hnatowicz
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  5. Petr Sajdl
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Correspondence to Vaclav Švorčík.

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Podgrabinski, T., Švorčík, V., Macková, A. et al. Dielectric properties of doped polystyrene and polymethylmethacrylate. J Mater Sci: Mater Electron 17, 871–875 (2006). https://doi.org/10.1007/s10854-006-0040-1

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  • DOI: https://doi.org/10.1007/s10854-006-0040-1

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