Joshi, G. P. and Saxena, N. S. and Sharma, T. P. and Mishra, S. C. K. (2006) Measurement of thermal transport and optical properties of conducting polyaniline. Indian Journal of Pure and Applied Physics, 44 (10). 786-790. ISSN 0019-5596
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Abstract
Measurements of effective thermal conductivity Q,) and effective thermal diffusivity (X,) of twin pellets of conducting polyaniline, prepared under a load of 5 ton were carried out from room temperature to 170 degrees C at normal pressure using transient plane source (TPS) technique. The values of lambda(c) and chi(c) by the use of an empirical relation at various fixed temperature in the above mentioned range have been calculated. The calculated values are in good agreement with the experimental results over the entire range of temperatures of investigation. Besides, the optical band gap of the sample is determined using reflection spectra in the wavelength region 300-800 nm. From the analysis of reflection spectra, polyaniline is found to have energy band gap 3.1 eV. The results indicate that band gap values are dependent on annealing temperatures of the samples and X, and X, vary with annealing temperature in the range from room temperature to 170 degrees C. The effective thermal conductivity and effective thermal diffusivity are maximum at about 100 degrees C, whereas the optical band gap is minimum for the sample annealed at 100 degrees C as compared to other annealing temperatures.
| Item Type: | Article |
|---|---|
| Subjects: | Materials Science Applied Physics/Condensed Matter Physics Polymer Science |
| Divisions: | UNSPECIFIED |
| Depositing User: | Users 27 not found. |
| Date Deposited: | 11 May 2018 07:09 |
| Last Modified: | 11 May 2018 07:09 |
| URI: | http://npl.csircentral.net/id/eprint/2510 |
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