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Preparation and Composition Optimization of PEO:MC Polymer Blend Films to Enhance Electrical Conductivity

1
Department of General Science, College of Education and Language, University of Charmo, Chamchamal 46023, Kurdistan Region, Iraq
2
Advanced Materials Research Laboratory, Department of Physics, College of Science, University of Sulaimani, Sulaimani 46001, Kurdistan Region, Iraq
3
Komar Research Center, Komar University of Science and Technology, Sulaimani 46001, Kurdistan Region, Iraq
*
Author to whom correspondence should be addressed.
Polymers 2019, 11(5), 853; https://doi.org/10.3390/polym11050853
Received: 20 March 2019 / Revised: 1 May 2019 / Accepted: 8 May 2019 / Published: 10 May 2019
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Abstract

The polymer blend technique was used to improve amorphous phases of a semicrystalline polymer. A series of solid polymer blend films based on polyethylene oxide (PEO) and methylcellulose (MC) were prepared using the solution cast technique. X-ray diffraction (XRD), Polarized optical microscope (POM), Fourier transform infrared (FTIR) and electrical impedance spectroscopy (EIS) were used to characterize the prepared blend films. The XRD and POM studies indicated that all polymer blend films are semicrystalline in nature, and the lowest degree of crystallinity was obtained for PEO:MC polymer blend film with a weight ratio of 60:40. The FTIR spectroscopy was used to identify the chemical structure of samples and examine the interactions between chains of the two polymers. The interaction between PEO and MC is evidenced from the shift of infrared absorption bands. The DC conductivity of the films at different temperatures revealed that the highest conductivity 6.55 × 10−9 S/cm at ambient temperature was achieved for the blend sample with the lowest degree of crystallinity and reach to 26.67 × 10−6 S/cm at 373 K. The conductivity relaxation process and the charge transport through the hopping mechanism have been explained by electric modulus analysis. The imaginary part of electrical modulus M″ shows an asymmetrical peak, suggesting a temperature-dependent non-Debye relaxation for the PEO:MC polymer blend system. View Full-Text
Keywords: polymer blend films; crystallinity; optical micrographs; impedance spectroscopy; electrical modulus polymer blend films; crystallinity; optical micrographs; impedance spectroscopy; electrical modulus
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Ahmed, H.T.; Abdullah, O.G. Preparation and Composition Optimization of PEO:MC Polymer Blend Films to Enhance Electrical Conductivity. Polymers 2019, 11, 853.

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