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    • Keywords


      Transient currents; cellulose acetate; polyvinyl acetate; induced dipoles; space charge; plasticization effect

    • Abstract


      The transient currents measured in discharge mode with cellulose acetate (CA): polyvinyl acetate (PVAc) blend films (≈ 20µm thick) as a function of charging field [(1.5–4.5)×104 V/cm], temperatures (323–373 K) and polymer weight ratio (90:10 and 75:25) have been found to follow Curie-von Schweidler law, characterized with two slopes in short and long time regions. Isochronals characteristics (i.e. current/temperature plots at constant times) constructed from these data seemed to reveal a broad peak observed at 363 K. Values of activation energy increase with PAVc content and also with time of observation. Space charge due to trapping of injected charge carriers in energetically distributed traps and induced dipoles created because of the piling up of charge carriers at the phase boundary of heterogeneous structure of blend are considered to account for the observed currents.

    • Author Affiliations


      P K Khare1 R S Chandok1 2 A P Srivastava1 3

      1. Department of Postgraduate Studies and Research in Physics, Rani Durgavati Vishwavidyalaya, Jabalpur - 482001, India
      2. Shri Guru Tegh Bahadur Khalasa College, Jabalpur - 482001, India
      3. 39, SBI Colony, SAF Road, Makronia, Sagar - 470003, India
    • Dates

  • Pramana – Journal of Physics | News

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      Posted on July 25, 2019

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