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Synthesis and Characterization of PVP: PVC: NH4NO3

C. Latha1,2 and K. Venkatachalam3

1Research and Development Centre, Bharathiar University, Coimbatore, Tamil Nadu, INDIA. 2S.N.S College of Engineering, Coimbatore, Tamil Nadu, INDIA. 3Government Arts College (Autonomous), Coimbatore-641018, Tamil Nadu, INDIA.


Polymer blending is one of the most important methods used to obtain new polymeric materials and it is a useful technique for designing electrolyte materials with required modifications in the properties such as electrical, thermal and mechanical. PVP-PVC blend membrane doped with different molar weight percentage of Ammonium nitrate has been prepared by solution casting technique using DMF as solvent. XRD, FTIR, DSC and AC impedance studies have been made for the above membrane. XRD studies revealed that amorphous nature of PVP has been increased in 70%PVP: 30%PVC. It is also observed that the amorphous nature of 70%PVP: 30%PVC is further increased on addition of different concentration of NH4NO3. A complex formation of PVP: PVC, PVP: PVC: NH4NO3 have been confirmed by FTIR studies. Proton conductivity for above film has been measured using impedance spectroscopy. Undoped blend polymer 70%PVP: 30%PVC showed an ionic conductivity of 8.46X10-8Scm-1. The conductivity of the blend film increases as concentration of NH4NO3 increases. The maximum proton conductivity 3.42x10- 4Scm-1 has been observed for 70%PVP: 30%PVC: 0.3 Molar weights (Mwt) of NH4NO3. Dielectric and modulus behaviours have been studied for the above membrane.

Keywords : PVP, Proton conducting, DMF, conductivity analysis, Electrolyte, Relaxation frequency.