In this study, poly(acrylonitrile-$co$-vinyl acetate) (P(AN-$co$-VAc)) composite films were prepared by chemical polymerization of pyrrole(Py), $N$-methyl pyrrole (NMPy) and $N$-phenyl pyrrole (NPhPy) with cerium(IV) [Ce(IV)] on P(AN-$co$-VAc) matrix. An increase was observed in the absorbances of CN ring stretching vibration (1451 $cm^{-1}$) by introducing pyrrole (Py) derivatives on P(AN-$co$-VAc) matrix. The nitrile (CN) and carbonyl (C=O) groups played a significant role on the interactions with cationic sites of Py derivatives. Conductivity was increased in the presence of carbonyl (C=O) groups due to their additional negative charges on P(AN-$co$-VAc) matrix compared to PAN. Poly($N$-Phenyl Pyrrole) (PNPhPy) exhibited higher dielectric constant and AC conductivity in the frequency range between the $10^{-2}-10^7$ Hz. The TGA results exhibited shifts of peak to higher temperatures by the presence of Py derivatives by increasing the weight loss %.