SIMPLE METHOD FOR DETERMINING WATER DIFFUSION-COEFFICIENT IN CONDUCTING POLYMERS

Water increases electrical conductivity of polyaniline. A simple metho d of the conductivity measurement for determining the diffusion coeffi cient D of water in conducting polymer matrices is presented in this w ork. The geometry of the conducting polymer samples can vary in wide r ange and the initial water content can be totally arbitrary. With the method based on the general theory D(H2O) in protonated polyaniline wa s measured to be ca. 5x10(-10) cm(2)/s at room temperature which is in a good accordance with the values measured with other methods.