TITLE:
Micro-Structure, Ac Conductivity and Spectroscopic Studies of Cupric Sulphate Doped PVA/PVP Polymer Composites
AUTHORS:
K. Hemalatha, H. Somashekarappa, R. Somashekar
KEYWORDS:
Crystallanity, X-Ray Diffraction, Amorphous, Microstructural Parameters, Ac Conductivity
JOURNAL NAME:
Advances in Materials Physics and Chemistry,
Vol.5 No.10,
October
16,
2015
ABSTRACT: A
series of polyvinyl alcohol/polyvinyl pyrrolidone polymer composite films doped
with different amount of cupric sulphate (CuSO4) were prepared by
means of solution casting technique. These films were characterized by X-ray
diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Ultraviolet-Visible
absorbance spectroscopy (UV-Vis) and Ac conductivity measurement studies. XRD patterns
of these films recorded at room temperature show the increase in amorphousity
of the matrix with the increase in the concentration of CuSO4 in
polymer composites. Microstructural parameters were computed using an in-house
program employing XRD data. Recorded FT-IR spectra give information about the
stretching and bending of the characteristic absorption bands in these films.
The variation in the transmittance has been studied with the help of recorded
UV-Vis spectra and hence the optical band gap present in the samples is also
calculated. The measured Ac conductivity shows how the conductivity varies in
these films with the presence of different amount of CuSO4 in these
films.