Polyaniline, PAni, has very promising industrial applications because of its good environmental stability, low cost and simple synthesis. Polyaniline doped with organic protonic and polymeric acids shows improved solubility and processability by conventional methods. In this work we report the results of doping polyaniline with dodecylbenzenesulphonic acid (PAni-DBSA) and reprocessing with polystyrene sulphonic acid (PSS) in an internal mixer, to obtain a conductive polymer blend (PAni-DBSA/PSS). This investigation of the blend properties focused on the thermal stability, calorimetric behaviour and resulting electrical conductivity.