ELECTRICALLY ANISOTROPIC MATERIALS - POLYANILINE PARTICLES ORGANIZED IN A POLYURETHANE NETWORK

Electrically conducting polyaniline particles were organized by an ele ctric held in a liquid medium, which was subsequently polymerized to p roduce a polyurethane network. The changes in electrical conductivity during polymerization were recorded. The chains of conducting polyanil ine particles oriented in the direction of the electric field became f ixed in the polymer network. In this way, electrically anisotropic mat erials were produced. The conductivity in the direction parallel to th e orientation was several times higher than that in the perpendicular one. The conductivity of these composite materials increases with temp erature, while the electrical anisotropy decreases. The effect of elec trical anisotropy is explained by simple geometric considerations.