Abstract
The purpose of this study was to improve polyvinylpyrrolidone (PVP) electrical conductivity by means of gamma irradiation for a dosimetric application. PVP was irradiated with various doses of γ radiation and dissolved in water to investigate its structural, optical, and electrical characteristics. Electron paramagnetic resonance measurements (EPR) depicted the presence of free radical (H·). FTIR and UV–visible spectra revealed a structural deformation in the post-irradiated polymer (PVP*) through chain scission. In addition, the gap and Urbach energy were investigated and discussed. The obtained results of electrical conductivity show an exponential behavior indicating a character of a pseudo-polyelctrolyte. The pH measurements revealed an acidic character of PVP*.
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Acknowledgements
The authors gratefully acknowledge financial support from the Tunisian Ministry of Education, Research, and Technology. Express sincere thanks to Dr Faouzi Hosni, a head laboratory in CNSTN, for polymer irradiation and EPR measurements. Also, to Dr Khaled Farah for giving us the opportunity to work on the absorbance UV–Visible.
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Belaidi, A., Guettari, M. & Tajouri, T. Gamma-ray irradiation-induced variations in structural and electrical properties of PVP neutral polymer in water. J Radioanal Nucl Chem 322, 869–877 (2019). https://doi.org/10.1007/s10967-019-06803-3
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DOI: https://doi.org/10.1007/s10967-019-06803-3