Determination of extremely low percolation threshold electroactivity of the blend polyvinyl chloride/polyaniline doped with camphorsulfonic acid by cyclic voltammetry method

The percolation threshold of prepared blends of poly(vinyl chloride) (PVC) with doped polyaniline (PANi) from camphorsulfonic acid (CSA) was investigated by cyclic voltammetry. The blends were formed from N-methyl pyrrolidone (NMP) solutions and PANi–CSA/PVC with weight fractions from 0.1% to 0.005%. The film of blends were prepared by casting the above polymer solutions on a glass carbon (GC) electrode. Voltammograms were drew in a one-compartment cell fitted with a GC electrode, Pt electrode and SCE as working, auxiliary and reference electrode respectively, in 1 M perchloric acid as electrolytic solution. The obtained results showed that PANi–CSA/PVC blend onto 0.007% weight from PANi is electroactive. The structure and morphology of prepared blends were investigated by FT-IR spectra and optic microscope.