Electric Modulus and Scaling of Chitosan/PVA Biopolymer Blend | ||||
| Egyptian Journal of Chemistry | ||||
| Article 46, Volume 65, Issue 1, January 2022, Page 459-471 PDF (979.75 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejchem.2021.81068.4015 | ||||
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| Authors | ||||
M. T. Ahmed   1; H. Elhendawy2; Z. M. Elqahtani3; Wafaa Bakr Elsharkawy 4; M. A. Azzam5; Tarek Fahmy 1
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| 11Dept. of Physics, College of Science and Humanities in Al-Kharj, Prince Sattam bin Abdulaziz University, Al-Kharj 11942, Kingdom of Saudi Arabia. 2Polymer Research Group, Physics Dept., Faculty of Science, Mansoura University, 35516 | ||||
| 2Department of Basic Science, Delta Higher Institute for Engineering and Technology, 11152 Mansoura, Egypt | ||||
| 3Dept. of Physics, College of Science, Princess Nourah bint Abdulrahman University, Ryiadh, Saudi Arabia | ||||
| 4physics, faculty of science and humanities studies, prince Sattam bin Abdulaziz university, Alkharj, Saudi Arabia | ||||
| 5Chemistry Department, College of Science and Humanities, Prince Sattam bin Abdulaziz University, 11942 Al-Kharj | ||||
| Abstract | ||||
| Dielectric measurements of chitosan/PVA polymer blends were performed at various temperatures in a wide frequency range. Higher values of / and // at higher temperatures and lower frequencies are correlated to interfacial polarization (IP) and DC conduction, respectively. Isochronal behavior of // against temperature revealed that chitosan and PVA is characterized by a dipolar relaxation peak at T= 393 K and 348 K, respectively. The activation energy (Ea) values of conduction have been estimated for all samples. Cole-Cole behavior revealed that, with increasing the temperature the semicircles area of the samples increased and the semicircle intercept are shifted towards higher value of / indicating that, the capacitance is increased. Complex electric modulus (M*) of all samples is investigated and it is found that, real part (M/) of the complex electric modulus showed nonlinear behavior with frequency, whereas, (M//), i.e., the imaginary part, is characterized by a relaxation peaks for all samples. The scaling behavior has been carried out at T= 333 K, as a representative temperature and it is found that, all the curves are overlapped leading to a master curve indicating that, dynamic process is temperature independent. | ||||
| Keywords | ||||
| Chitosan; PVA; Electric modulus; Relaxation; Scaling | ||||
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