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Magdy Mohammed GHANNAM

Professor

Bio and Medical Physics

كلية العلوم
B4- G1, AA16
publication
Journal Article
2010

Influence of titanium chloride addition on the optical and dielectric properties of PVA films

Ghannam, M. Abdelaziz and Magdy M. . 2010

Polymeric films based on polyvinyl alcohol (PVA) doped with titanium chloride (TiCl3) at different
weight percent ratios were prepared using the solvent cast technique. The structural properties of these
polymeric films are examined by XRD and FTIR studies. The complexation of the dopant with the
polymer was confirmed by FTIR studies. The XRD pattern reveals that the amorphous domains of PVA
polymer matrix increased with raising the TiCl3 content. The optical properties of these polymeric films
were examined by optical absorption and emission spectroscopy. Electrical conductivity was measured
at room temperature of pure PVA and PVA doped with different concentrations of TiCl3 from 20 Hz to
3 MHz. The conductivity was found to increase with the increase in dopant concentration. The dielectric
constant (e0) indicates a strong dielectric dispersion in the studied frequency range and increases as
dopant content increases. This increase in both s and e0 is attributed to the increase in the localized
charges distribution. Moreover, a loss peak was identified in the dielectric loss spectra and it is
attributed to the orientation of polar groups.

Publication Work Type
Research Work
Volume Number
405
Issue Number
Magazine \ Newspaper
Physica B - Condensed Matter
Pages
958–964.
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Polymeric films based on polyvinyl alcohol (PVA) doped with titanium chloride (TiCl3) at different
weight percent ratios were prepared using the solvent cast technique. The structural…

by M. Abdelaziz and Magdy M. Ghannam
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