New polyimides containing 4,4'-bipyridinium units were synthesized by the reaction of bis(dichloromaleimide)arylene derivatives with 4,4'-bipyridine in meta-cresol. IR and H-1-NMR spectroscopy and elemental analysis as well confirmed their structures. The polymers were characterized by viscometric measurements, softening points, and thermogravimetric data. (C) 2004 Wiley Periodicals.