Structural, Optical and Electrical conductivity Studies of Mn2+ Ions Doped PVA/MAA:EA Polymer Blend Films

Ojha Pravakar¹ , T. Siddaiah² , N.O. Gopal³ , Ch. Ramu⁴

Section:Research Paper, Product Type: Isroset-Journal
Vol.6 , Issue.6 , pp.80-87, Dec-2018

CrossRef-DOI:   https://doi.org/10.26438/ijsrpas/v6i6.8087

Online published on Dec 31, 2018

Copyright © Ojha Pravakar , T. Siddaiah , N.O. Gopal, Ch. Ramu . 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.
 

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Abstract :
Pure and different concentrations of Mn2+ (1.0, 2.0, 3.0, 4.0 and 5.0 mol%) doped PVA/MAA:EA polymer blend films were prepared by solution casting method. The structural analysis of the prepared samples by X-ray Diffraction reveals broadening of diffraction peak which implies a lower degree of crystallinity with higher Mn2+ concentration. UV-Vis spectral analysis shows a significant red shift in the optical band gap with increase in Mn2+ concentration. FTIR spectrum exhibits bands characteristic of stretching and bending vibrations O–H, C–H, C=C and C–O groups and the changes in the FTIR spectrum with dopant concentration indicate the complexation of dopant with the polymer blend. The conductivity study shows that the doping of Mn2+ ions into the polymer blend system enhances its ionic conductivity from 2.46 X 10-8 Scm-1 for pure film to 1.41 X 10-7 Scm-1 for 5 mol% of Mn2+ ions at room temperature, which is due to the increase in mobile charge carriers and their increased mobility which is explained in terms of an increase in the amorphicity

Key-Words / Index Term :
PVA/MAA:EA polymer blend, Mn doping, optical band gap, amorphicity and electrical conductivity

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