Poly(vinyl) chloride (PVC)-NH4I-EC films have been prepared by solution cast technique. The sample containing 30 wt. % NH4I exhibited highest room temperature conductivity of 4.60 × 10-7S cm-1. The conductivity increased to 1.08 × 10-6Scm-1when 15 wt. % of ethylene carbonate (EC) was added to 70 wt. % PVC - 30 wt. % NH4I. Fourier Transform Infrared (FTIR) showed evidence of polymer–salt complexation while DSC showed increase in glass transition temperature (Tg) of PVC -NH4I - EC polymer electrolytes. The conductivity behavior of the studied system could be accounted by the changes in Tgvalues.

The effect of different molar ratios on the synthesis of zinc aluminium layered double hydroxide (Zn/Al LDH) via an alkali-free route was carried out in this research. This method was prepared by mixing zinc nitrate solution, aluminium nitrate solution, and ammonium carbonate solution at a constant pH of 8.5 with a spanning ratio of Zn to Al from 4:1, 3:1, and 2:1. The XRD patterns showed crystal nanostructure of Zn/Al LDHs was successfully formed. The lattice parameters (a and c) were slightly increased with the increasing of Zn/Al molar ratio. A larger hexagonal platelet is observed in the SEM image align with the high molar ratio of Zn/Al synthesized. The same trend has been observed in the FTIR spectra.   Keywords: Zn/Al LDH, alkali-free route, different molar ratio, XRD, SEM, FTIR

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Solid polymer electrolytes (SPEs) with poly (vinyl) chloride (PVC) doped with a fixed amount of ammonium trifluoro methane sulfonate (NH4Tf) and with varying concentrations of ionic liquid butyltrimethyl ammonium bis (trifluoromethyl sulfonyl) imide (Bu3MeNTf2N) were synthesised via solution cast technique. PVC-NH4Tf-Bu3MeNTf2N-based SPEs with 15 weight % Bu3MeNTf2N exhibit conductivity of 1.56 x 10-4 Scm-1 at room temperature. The ionic conductivity is attributed to the dissociation of NH4Tf facilitated by Bu3MeNTf2N. Results of XRD indicate that the most amorphous film has the highest conductivity and this is corroborated by the results of DSC. FTIR spectra revealed that Bu3MeNTf2N has weak interaction suggesting that it acts mainly as a lubricant to facilitate polymer segmental motion.

Poly (vinyl) chloride (PVC)-based proton conducting polymer electrolytes have been prepared by solution cast technique. The effect of addition of ethylene carbonate (EC) as the plasticizer on the structural property of the prepared proton conducting polymer electrolyte system was investigated by X-Ray diffraction (XRD) and Fourier Transform Infrared Spectroscopy (FTIR) while its effect on electrical property was investigated by Impedance Spectroscopy (IS). With addition of plasticizer, the crystalline nature of the polymer was found to be disrupted as revealed by X-Ray diffraction. FTIR showed interactions between Cl-and H+which was accounted by shifts in the bands of Cl-. Ionic conductivity was found to be 3.06 x 10-5S cm-1at room temperature (300 K)for the films containing 95 wt. % (PVC -NH4CF3SO3) –5 wt. % EC.