Conductive polyurethane (PU) foams were prepared using a two-step procedure. First, PU foams were impregnated with the oxidant 12 from a ScCO2 solution. Subsequently, the foams were subjected to pyrrole vapor, which polymerized within the foam in the presence of the oxidant. The reduced form of iodine as a result of the oxidative polymerization of pyrrole functions as a dopant. The conductivities of the foams ranged from 10(-7) to 10(-2) S/cm and the foams were flexible and not brittle. The concentration of conductive polypyrrole, i.e. the PPY-I-2 charge-transfer complex, needed to achieve a conductivity of 10(-4) 10(-3) S/cm was about 22% w/w. The solubility Of 12 in ScCO2 and the partition coefficients Of 12 between PU foam and ScCO2 solution were determined. (C) 2003 Elsevier B.V. All rights reserved.