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Structure, Microstructure and Dielectric Studies of PVA/Sr(Co1/3Nb2/3)O3 Polymer Composites


Affiliations
1 Department of Physics, The Maharaja Sayajirao University of Baroda, Vadodara, India
2 Krishna Institute of Engineering and Technology, Department of Applied Sciences, Ghaziabad, India
 

Polymer-Ceramic composite films of Polyvinyl alcohol (PVA) and Sr(Co1/3Nb2/3)O3 (SCN) as filler, were prepared by solution casting technique. The structure and microstructure of the samples has been characterized using X-ray diffraction, infrared spectroscopy (Fourier transformed infrared spectroscopy) and Scanning electron microscopy (SEM). Thermal properties of the samples are studied by means of Differential Scanning Calorimetry (DSC) revealed that the glass transition temperature increases for the composites [PVA + 10% SCN (Tg = 109°C)] compared to pure PVA (Tg = 97°C) samples. The dielectric characterization has been studied by means of impedance gain-phase analyzer. It is concluded that addition of 50% SCN lead to significant advantage on the dielectric properties of Polyvinyl alcohol polymers. Observed changes in the dielectric dispersion at high temperatures are essentially linked to the glass transition temperature (Tg) rather than due to lattice based dielectric dispersion.

Keywords

Polymer Composite, Dielectric Constants, UV-Visible Spectroscopy.
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  • Structure, Microstructure and Dielectric Studies of PVA/Sr(Co1/3Nb2/3)O3 Polymer Composites

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Authors

Nishant Barot
Department of Physics, The Maharaja Sayajirao University of Baroda, Vadodara, India
Bhagwati Bishnoi
Krishna Institute of Engineering and Technology, Department of Applied Sciences, Ghaziabad, India
Sagufta Jahan
Department of Physics, The Maharaja Sayajirao University of Baroda, Vadodara, India
Prashant K. Mehta
Department of Physics, The Maharaja Sayajirao University of Baroda, Vadodara, India
N. L. Singh
Department of Physics, The Maharaja Sayajirao University of Baroda, Vadodara, India

Abstract


Polymer-Ceramic composite films of Polyvinyl alcohol (PVA) and Sr(Co1/3Nb2/3)O3 (SCN) as filler, were prepared by solution casting technique. The structure and microstructure of the samples has been characterized using X-ray diffraction, infrared spectroscopy (Fourier transformed infrared spectroscopy) and Scanning electron microscopy (SEM). Thermal properties of the samples are studied by means of Differential Scanning Calorimetry (DSC) revealed that the glass transition temperature increases for the composites [PVA + 10% SCN (Tg = 109°C)] compared to pure PVA (Tg = 97°C) samples. The dielectric characterization has been studied by means of impedance gain-phase analyzer. It is concluded that addition of 50% SCN lead to significant advantage on the dielectric properties of Polyvinyl alcohol polymers. Observed changes in the dielectric dispersion at high temperatures are essentially linked to the glass transition temperature (Tg) rather than due to lattice based dielectric dispersion.

Keywords


Polymer Composite, Dielectric Constants, UV-Visible Spectroscopy.

References