Different weight percentage of ZnBr_(2) doped poly(vinyl alcohol)(PVA)free standing composite films were prepared using solution casting method.These films were characterized for analyzing structural,dielectric,electr...Different weight percentage of ZnBr_(2) doped poly(vinyl alcohol)(PVA)free standing composite films were prepared using solution casting method.These films were characterized for analyzing structural,dielectric,electrochemical properties.This paper mainly focused to understand the contribution of physical phenomenon on conductivity in terms of dielectric parameters.FTIR spectrum confirms the interaction between ZnBr_(2) and PVA.Pseudo-capacitive behavior observed from cyclic voltammograms.Dielectric properties of the composites follow non-Debye type behavior.The conducting phenomenon occurs due to hopping of ions between coordination sites present in the composite and the segmental relaxation of polymer chain.展开更多
This paper focuses on the dielectric constant("0),dielectric loss factor("00)and frequency dependent conductivity(ac)properties of newly prepared poly(vinylalcohol)(PVA)chitosan(CS)composite films incorpora...This paper focuses on the dielectric constant("0),dielectric loss factor("00)and frequency dependent conductivity(ac)properties of newly prepared poly(vinylalcohol)(PVA)chitosan(CS)composite films incorporated with different concentrations of LiClO_(4).The composite films were prepared using solution casting technique.The complexation between salt and polymer host is confirmed by FT Raman and UV-Vis studies.The sample containing 20 wt.%LiClO_(4)exhibits a highest ionic conductivity of 3106 S/cm at room temperature.The dielectric properties of the composites follow non-Debye behavior.展开更多
基金Science and Engineering Research Board(SERB)Department of Science and Technology(DST),Government of India for the research projects(SR/FTP/PS-011/2010)and(SB/EMEQ-089/2013).
文摘Different weight percentage of ZnBr_(2) doped poly(vinyl alcohol)(PVA)free standing composite films were prepared using solution casting method.These films were characterized for analyzing structural,dielectric,electrochemical properties.This paper mainly focused to understand the contribution of physical phenomenon on conductivity in terms of dielectric parameters.FTIR spectrum confirms the interaction between ZnBr_(2) and PVA.Pseudo-capacitive behavior observed from cyclic voltammograms.Dielectric properties of the composites follow non-Debye type behavior.The conducting phenomenon occurs due to hopping of ions between coordination sites present in the composite and the segmental relaxation of polymer chain.
基金The authors are thankful to Department of Atomic Energy,Board of Research in Nuclear Sciences(BRNS),Government of India for the research project(2010/37C/7/BRNS/832)Department of Science and Technology(DST),Government of India for the research project(SR/FTP/PS-011/2010).
文摘This paper focuses on the dielectric constant("0),dielectric loss factor("00)and frequency dependent conductivity(ac)properties of newly prepared poly(vinylalcohol)(PVA)chitosan(CS)composite films incorporated with different concentrations of LiClO_(4).The composite films were prepared using solution casting technique.The complexation between salt and polymer host is confirmed by FT Raman and UV-Vis studies.The sample containing 20 wt.%LiClO_(4)exhibits a highest ionic conductivity of 3106 S/cm at room temperature.The dielectric properties of the composites follow non-Debye behavior.
