In this work, due to the effective interfacial interactions between reduced graphene oxide (RGO) planes and polyaniline (PANI) chains, a conductive network was designed and fabricated by in situ polymerization of aniline monomer on the RGO planes. Then, the polyvinyl chloride (PVC) was modified with the conductive network by simple solution blending. A significant enhancement in the conductive properties of PVC films was obtained with a 4.0 wt % RGO and 7.0 wt % PANI loading. When the PANI was coated on RGO, the PANI was easier to connect mutually and enhanced the conductivity network for composites. Thermal analysis of the composite films showed the thermal stability of PVC was also improved after modified. (c) 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013