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Indian Journal of Pure & Applied Physics (IJPAP) >
IJPAP Vol.43 [2005] >
IJPAP Vol.43(10) [October 2005] >
| Title: | Study of impedance spectroscopy conducting polymer prepared with the use of water soluble support polymer |
| Authors: | Ray, D K
Himanshu, A K
Sinha, T P |
| Keywords: | Conducting polymer
Polyaniline-polyvinyl alcohol
Impedance spectroscopy
Dipolar motions |
| Issue Date: | Oct-2005 |
| Publisher: | CSIR |
| IPC Code: | G01J3/00,C08F118/00 |
| Abstract: | The intrinsically
conducting polymer (ICP), polyaniline (PANI) is synthesized by chemical
oxidative polymerization process with the help of water soluble support polymer
poly-vinyl alcohol (PVA). The field dependence of the dielectric response is
measured in the frequency range 50 Hz-1 MHz and temperature range 140-318 K.
The frequency dependence of the imaginary impedance (Z'') is found to obey an Arrhenius law with the activation energy of
0.0176 eV. An analysis of real and imaginary parts of dielectric permittivity,
conductivity formalism and impedance (Z) with frequency and temperature is
performed, showing the polydispersive nature of the sample as confirmed by
Cole-Cole plot as well as the scaling behaviour of the Z''. The frequency dependent electrical data are discussed in the
context of models for dc and ac transport in PANI-PVA composite, with
the results supporting hopping of charges among positively charged polaron and
bipolaron states. These results elucidate that there is an increased coupling
among the local dipolar motions (short-range order localized motion). |
| Page(s): | 787-793 |
| ISSN: | 0975-1041 (Online); 0019-5596 (Print) |
| Source: | IJPAP Vol.43(10) [October 2005]
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