• Fulltext

       

        Click here to view fulltext PDF


      Permanent link:
      https://www.ias.ac.in/article/fulltext/boms/038/05/1213-1221

    • Keywords

       

      Percolation; transport properties; VTF model; ionic conductivity; Williams–Landel–Ferry.

    • Abstract

       

      This paper presents the investigation on physicochemical properties and ionic conductivity of LiClO4-doped poly(vinyl alcohol) (PVA)/modified cellulose composites. The percolative behaviour of LiClO4 with dc conductivity (𝜎dc) for different LiClO4 weight fractions (p) related to transport dimensionality was also focused. The highest ionic conductivity of 9.79 × 10–6 S cm–1 was observed for 20 wt% LiClO4 doping level at room temperature. The activation energies (𝐸g) were estimated using temperature-dependent conductivity, which follows the Arrhenius and Vogel–Tammann–Fulcher (VTF) relation. The dynamic fragility (𝑓) and activation energy (𝐸g) vs. 𝑇g of polymer composites using equivalence of the both Williams–Landel–Ferry (WLF) and VTF equations were also correlated. Transport properties such as travel time of ions between sites (𝜏o), mobility (𝜇), diffusion coefficient (𝐷) and number of transitions per unit time 𝑃(𝐸) for normal cationic (Li+) hopping process of LiClO4-doped PVA/mCellulose composites have been investigated using the Rice and Roth model.

    • Author Affiliations

       

      Sunil G Rathod1 R F Bhajantri2 V Ravindrachary1 P K Pujari3 G K Nagaraja4 Jagadish Naik1 Vidyashree Hebbar2 H Chandrappa2

      1. Department of Physics, Mangalore University, Mangalagangotri 574 199, India
      2. Department of Physics, Karnatak University, Dharwad 580 003, India
      3. Radiochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, India
      4. Department of Chemistry, Mangalore University, Mangalagangotri 574 199, India
    • Dates

       
  • Bulletin of Materials Science | News

    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

© 2017-2019 Indian Academy of Sciences, Bengaluru.