Research Journal of Recent Sciences _________________________________________________ ISSN 2277-2502
Vol. 1 (ISC-2011), 238-243 (2012)
Res.J.Recent Sci.

The Study of Mechanisms of Charge Production in
Pure and Sensitized Polymer Films
Bhardwaj M.K.1 and Khare P.K.2
Department of Physics, Govt. College Khategaon, Dist. Dewas, MP, INDIA
2
Dept. of PG Studies and Research in Physics and Electronics, RD University, Jabalpur, MP, INDIA
1

Available online at, www.isca.in
(Received 15th October 2011, revised 10th January 2012, accepted 25th January 2012)

Abstract
The mechanisms of charge production in pure and malachite green sensitized Polyvinyl chloride (PVC) samples have been studied
by short circuit thermally stimulated depolarization current (TSDC) measurement and ultraviolet spectroscopy (U.V.) studies. The
samples were prepared by the casting from solution technique whose thickness measured around 30µm. The samples were
sandwiched between similar aluminum electrodes and polarized at temperature 105 oC with polarizing fields 20, 30, 40 and
50kV/cm. Two peaks current maximum found around at 63±8 and138±7°C for pure, 06 and 7.5% sensitized PVC samples, while for
higher concentration (i.e.10 and 15%) one peak was measured around ≈65 oC in positive direction and the other peak around
≈140oC in the negative direction. The TSDC spectra have been used to calculate activation energy by initial rise method .The
calculated activation energies are 0.389-0.719ev for pure PVC and 0.298-1.09ev for sensitized PVC samples. The magnitude of
peak current increases with polarizing field and temperature, dipolar, space charge and charge transfer complexes mechanisms
may be responsible for this nature. In the case of UV spectra no band appears in pure PVC however the addition of malachite
green, gives rise four absorption bands around 260, 310, 440, and 630nm.The average effect has been observed in the intensity of
third (400-450nm) and fourth bands (550-700nm). The formation of charge transfer complexes is evidenced in the UV-visible
absorption spectra by the appearance and change in the intensity of absorption bands.
Keywords: Thermally stimulated depolarization current (TSDC), ultraviolet spectroscopy, pure and sensitized polyvinyl chloride,
casting from solution technique, thermo electrets, dipolar, space charge and CTC`S mechanisms.

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