Aziz, Shujahadeen B. and Hamsan, M. H. and Kadir, M. F. Z. and Woo, H. J. (2020) Design of polymer blends based on chitosan:POZ with improved dielectric constant for application in polymer electrolytes and flexible electronics. Advances in Polymer Technology, 2020. ISSN 0730-6679, DOI https://doi.org/10.1155/2020/8586136.
Full text not available from this repository.Abstract
There is a considerable demand for the development and application of polymer materials in the flexible electronic- and polymer-based electrolyte technologies. Chitosan (CS) and poly(2-ethyl-2-oxazoline) (POZ) materials were blended with different ratios to obtain CS:POZ blend films using a straightforward solution cast technique. The work was involved a range of characteristic techniques, such as impedance spectroscopy, X-ray diffraction (XRD), and optical microscopy. From the XRD spectra, an enhancement in the amorphous nature in CS:POZ blend films was revealed when compared to the pure state of CS. The enhancement was verified from the peak broadening in CS:POZ blend films in relative to the one in crystalline peaks of the CS polymer. The optical micrograph study was used to designate the amorphous and crystalline regions by assigning dark and brilliant phases, respectively. Upon increasing POZ concentration, the dielectric constant was found to increase up to e ` = 6.48 (at 1 MHz) at 15 wt.% of POZ, and then a drop was observed beyond this amount. The relatively high dielectric constant and dielectric loss were found at elevated temperatures. The increase of POZ concentration up to 45 wt.% made the loss tangent to shift to the lower frequency side, which is related to increasing resistivity. The increases of dielectric constant and dielectric loss with temperature were attributed to the increase of polarisation. The loss tangent peaks were found to shift to the higher frequency side as temperature elevated. Obvious relaxation peaks were observed in the imaginary part of electric modulus, and no peaks were found in the dielectric loss spectra. The concentration dependent of M `' peaks was found to follow the same trend of loss tangent peaks versus POZ content. The relaxation process was studied in terms of electric modulus parameters.
| Item Type: | Article |
|---|---|
| Funders: | Ministry of Higher Education and Scientific Research, the Kurdish National Research Council (KNRC), Kurdistan Regional Government, Iraq, University of Sulaimani, Komar Research Center (KRC), Komar University of Science and Technology |
| Uncontrolled Keywords: | Chitosan; Dielectric devices; Dielectric losses; Electric losses; Films; Flexible electronics; Polymer blends; X ray diffraction |
| Subjects: | Q Science > Q Science (General) Q Science > QC Physics |
| Divisions: | Centre for Foundation Studies in Science Faculty of Science |
| Depositing User: | Ms Zaharah Ramly |
| Date Deposited: | 07 Nov 2024 06:26 |
| Last Modified: | 07 Nov 2024 06:26 |
| URI: | http://eprints.um.edu.my/id/eprint/36949 |
Actions (login required)
 |
View Item |
