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    • Dielectric properties of solution-grown-undoped and acrylic-acid-doped ethyl cellulose

      P K Khare Sandeep K Jain

      Polymers Volume 23 Issue 1 February 2000 pp 17-21

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/boms/023/01/0017-0021

    • Keywords

       

      Dielectric capacity; losses; ethyl cellulose; acrylic acid; charge transfer complexes

    • Abstract

       

      Dielectric capacities and losses were measured, in the temperature (50–170°C) and frequency (01–100 kHz range), for undoped and acrylic acid (AA) doped ethyl cellulose (EC) films (thickness about 20 μm) with progressive increase in the concentration of dopant in the polymer matrix. The variation of capacity with temperature is attributed to thermal expansion in the lower temperature region to the orientation of dipolar molecules in the neighbourhood of glass transition temperature (Tg) and random thermal motion of molecules aboveTg. The dielectric losses exhibit a broad peak. Doping with AA is found to affect the magnitude and position of the peak. AA is found to have a two-fold action. Firstly, it enhances the chain mobility and secondly, it increases the dielectric loss by forming charge transfer complexes.

    • Author Affiliations

       

      P K Khare1 Sandeep K Jain2

      1. Department of Postgraduate Studies and Research in Physics and Electronics, Rani Durgavati University, Jabalpur - 482 001, India
      2. University Science Instrumentation Centre, Dr H S Gour University, Sagar - 470 002, India

    • Dates

       
      Published
      February 2000
      Manuscript received
      14 September 1999
      Manuscript revised
      2 December 1999

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