Dielectric and FTIR studies on blending of [xPMMA–(1 − x)PVC] with LiTFSI

Poly(methyl methacrylate) (PMMA)/poly(vinyl chloride) (PVC) polymer blend electrolytes with lithium bis(trifluoromethanesulfonyl) imide (LiTFSI) as a dopant salt were prepared by solution casting technique. Various blend ratio of PMMA/PVC was studied in this present work. Based on the results obtained from AC-impedance spectra, the weight ratio of PMMA/PVC that is 70:30 exhibited the highest ionic conductivity at room temperature. The ionic conductivity and dielectric relaxation studies of the blended polymer electrolyte have been determined by AC-impedance spectroscopy over a wide frequency regime. In addition, Fourier Transform Infrared (FTIR) studies revealed the complexation between PMMA, PVC and LiTFSI.

► FTIR proves the omplexation between the PMMA, PVC and LiTFSI. ► 70 wt.% PMMA–30 wt.% of PVC achieved the highest ionic conductivity. ► Dielectric study is very helpful in understanding the behavior of polymer blends.