Laser Raman and ac impedance spectroscopic studies of PVA: NH4NO3 polymer electrolyte

Characterization of chitosan/PVA blended electrolyte doped with NH4I

“…PVA is partially crystalline with glass transition temperature, T g of 363 K [28]. Applications of PVA are mainly found in the biomedical field [29], packaging industry [30] and as host in electrolyte systems [5,28,31]. In this work, PVA with 88.7% degree of hydrolysis was used since Mac Farlane et al [32] reported that 88% hydrolyzed PVA exhibits higher conductivity compared to PVA with 99% degree of hydrolysis.…”

Optical, magnetic and electrical properties of multifunctional Cr3+: Polyethylene oxide (PEO) + polyvinylpyrrolidone (PVP) polymer composites

“…When the salt concentration is increased, the main band shifts to the higher wavenumber side and becomes asymmetric, as shown in Fig.3(c).This is also one of the evidences for the formation of ion pairs. In the case of PEO+PVP: Cr 3+ , only a single band at 1034 cm -1 is seen, which is associated with the presence of the free chloride anion The broadening in Raman spectra is usually an indication of amorphous or semi-crystalline nature of the blended polymer [20]. The semi crystalline nature of the polymer blend has also been confirmed by XRD analysis.…”

Energy transfer based photoluminescence spectra of (Tb3++ Sm3+):PEO+PVP polymer nano-composites with Ag nano-particles

“…In the doped systems, symmetric stretching of anion vibration is centered at 1046 cm À 1 is obtained. The broadening in Raman spectra is usually an indication of amorphous or semicrystalline nature of the blended polymer [26]. The semi-crystalline nature of the polymer blend has also been confirmed by XRD analysis.…”