Electrical properties of gamma-irradiated, pure, and nickel chloride-doped polyvinyl alcohol films

Abstract

ABSTRACT:The electrical transport properties, such as direct current (dc) electrical conductivity ( s), dielectric constant ( 1), and dc current-time characteristics of unirradiated and g-irradiated pure and NiCl 2 -doped PVA were studied in the temperature range of 26-155ЊC. Quantitative analysis was carried out to determine the thermal activation energy of the conduction process, drift mobility, and carrier concentration. The thermally activated mobility of charge carriers is confirmed from calculations of drift mobility at different g-doses and temperatures. The results obtained revealed that g-irradiation enhances the conductivity. The dielectric constant data at different temperatures before and after irradiation can be attributed mainly to the changes in the intra-and intermolecular interactions. The dc conductivity at 30 and 40ЊC, activation energy in low temperature region I, and 1 max for 20 wt % NiCl 2 proved to be dosedependent. The obtained data suggests that these materials may have an application in dosimetry.

Study the Frequency Dependence of Dielectric Properties of Gamma Irradiated PVA<sub>(1-x)</sub>PS<sub>x</sub> Polymer Blends

“…Thereafter an increase in frequency leads to rapid increase in AC conductivity. When the films are irradiated by γ-rays, ions and free radicals are formed and partially trapped in the bulk of the material [24]. Thus the conductivity of the irradiated film showed higher conductivity than that of unirradiated film for both temperature and frequency dependent conditions.…”

Synthesis and Characterization of Complexes of Remodulated Polyvinyl Alcohol Conjugates

“…CCMPVA shows characteristic broad peak for an orthorhombic lattice centered at 19 0 to 22 0 including semi crystalline nature of all CCMPVA [21]. With addition of transition metal ions, intensity of this peak decreases, suggesting the decrease in degree of crystallinity of the complex [22].…”

Effect of nano silicon dioxide on the structure and properties of FeCl3‐doped polyvinyl alcohol photopolymer film

“…Fe(III)‐doped PVA(Fe(III)‐PVA) photopolymer resin is a water soluble, environmentally friendly and UV‐curable polymer system, which does not involve toxic and harmful chemicals in the preparation and processing. Fe(III)‐PVA could be used for determining the diffraction efficiency, optical data processing technologies, real‐time holographic recording medium, electrodes for batteries and capacitors, and high‐temperature coatings. Fe(III)‐PVA is also a potential material for preparing flexographic‐printing plates .…”