• Complex permittivity and conductivity of poly(𝑝-phenylenediazomethine) and its blends at microwave frequencies

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      https://www.ias.ac.in/article/fulltext/boms/033/03/0265-0272

    • Keywords

       

      Poly(𝑝-phenylenediazomethine); d.c. conductivity; microwave conductivity; complex permittivity; doping; composites.

    • Abstract

       

      Poly(𝑝-phenylenediazomethine) was synthesized by the condensation reaction between glyoxal and 𝑝-phenylene diamine in different solvents like methanol, toluene, 𝑚-cresol and 𝑁,𝑁-dimethylformamide. The dielectric properties and microwave conductivity of the pelletized samples were measured using cavity perturbation technique. The measurements were done at 2.17 GHz at room temperature (25°C). The effect of dopants on the dielectric properties and conductivity was studied using HCl and HClO4. Dielectric properties like dielectric constant, dielectric loss factor and microwave conductivity increased on doping with HCl and HClO4. Conducting polymer composites were prepared by in situ polymerization of glyoxal and 𝑝-phenylenediamine in different solvents containing different amounts of PVC, and silica. The microwave conductivity and complex permittivity of each sample was measured. The effect of dopants like HClO4 and HCl on these dielectric properties was also studied. The d.c. conductivity of the pressed samples measured by the two-probe method was also studied.

    • Author Affiliations

       

      K G Princy1 Rani Joseph2 Honey John2 K T Mathew3

      1. Department of Chemistry, Carmel College, Mala 680 732, India
      2. Department of Polymer Science and Rubber Technology, Cochin University of Science and Technology, Cochin 682 022, India
      3. Department of Electronics, Cochin University of Science and Technology, Cochin 682 022, India
    • Dates

       
  • Bulletin of Materials Science | News

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