The utilization of conducting emeraldine salt (PANI-ES) and intrinsic leucoemeraldine polyaniline (PANI-LEB) in the synthesis of DGEBA-grafted PANI via anionic copolymerization is described. The structures of copolymers obtained were characterized by FTIR, (13)C and (1)H NMR. The extent of grafting was verified by THF Soxhlet (solvent extraction). The thermal properties of these new copolymers were described and their conductivities were reported. Results obtained indicated that the graft copolymer exhibited higher electrical and thermal conductivities than that of the blend counterpart. (C) 2011 Wiley Periodicals, Inc. J Appl Polym Sci 121: 4958, 2011