SYNOPSISPolyacrylonitrile-copper composite film was synthesized by electrochemical reduction of a swollen film made by blend solution of a polyacrylonitrile-copper(I1) ion which was coated on a electrode surface. The morphological structure of this composite film in the cross section was measured by a scanning electronic microscope and it showed three composite layers: a densely deposited layer, a transition layer, and an undeposited layer. The deposited layer consisted of the copper element and gave a high conductivity (10' S-em-'). In the transition layer, there was a great amount of a tree-shaped copper deposit, but no such deposit can be found in the undeposited layer. The experiment data showed that the conductivity of the film increases with increase of electrochemical reduction time and decreases with increase of ratio of nitrile group to the copper(I1) ion. The viscosity of polyacrylonitrile-copper(I1) ion solution is enhanced by a decrease of the ratio of the nitrile group to the copper(I1) ion.

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