New composite systems were prepared by deposition of conducting polymer (polypyrrole) and polyacrylic acid onto polyethylene porous support. Polypyrrole layers were formed by oxidative polymerization from the gas phase of the monomer, and the layers of polyacrylic acid were deposited from a water solution. Morphology of the systems was studied by atomic force microscopy. Measure-ments of density, electric, and mechanical characteristics of composites were carried out. The interactions between components of systems were investigated by IR spectroscopy. (c) 2005 Wiley Periodicals, Inc.