Polyfuran(PFu),poly(2-bromoaniline)(P2BrAn), and poly(2-bromoanitine)/polyfuran (P2BrAn/PFu) composites were synthesized by coupling using various solvents and oxidants. 2-Bromoaniline (2BrAn) was polymerized using FeCl3 and (NH4)(2)S2O8 in aqueous HCl medium. PFu was synthesized using FeCl, and SbCl, in anhydrous media (CHCI3, CH3CN). Furan was polymerized using both salts in CHCl3 medium, whereas it could be polymerized using only FeCl3 in CH3CN medium. The new electrically conducting composites were prepared by chemical oxidative polymerization using polyfuran synthesized with SbCl3 and poly(2-bromoaniline). The polymers and composites were characterized using conductivity, magnetic susceptibility, infrared spectra (FTIR), UV-Vis spectra, thermal analysis (TGA), and scanning electron microscopy (SEM) measurements. It was found that PFu(SbCl3) has the lowest thermal stability. Thus, the thermal stability of PFu was increased by preparing composites. The chemical structures of P2BrAns and composites have been found from UV-Vis results to contain quinone-imine units along the polymer chain. Magnetic susceptibility measurements indicated that the polymers and composites were diamagnetic or paramagnetic. (c) 2005 Wiley Periodicals, Inc.