Abstracto

Vogel Tamman-Fulcher (VTF) Conduction Mechanism in Polystyrene-AlCl3 Composites

Deepika S Yawale1*, Jyoti Dawande3, SV Pakade2, Jagram Singh Yadav3, SP Yawale1

The polystyrene AlCl₃ composites thin films having different thickness are prepared, by using isothermal immersion technique. The dc electrical conductivity is studied in the temperature range 373 K to 319 K. The graph of log σ versus 1/T is plotted and activation energy ΔE is calculated for six different compositions AlCl₃. It is found that conductivity increases, with increasing temperature and AlCl₃ wt % in Polystyrene. The plots of log σ versus 1/T are non-linear and divided into two linear regions. In high temperature region Arrhenius law and in low temperature region Vogel Tamman-Fulcher (VTF) model is applied. From this model pseudo activation energy is calculated. The VTF model explains the results well. XRD spectra show that all the films are amorphous in nature. The FTIR spectra shows aromatic C=C stretching vibrations and existence of benzene rings.