Polyacetylene polymer turned out to be more conductive than copper. Will expensive copper soon be replaced by plastic? And the main thing here is to create a long chain of unsaturated carbon atoms: over it the electrons interact with each other and thus provide electrical conductivity. This is called -delocalized P-system. It plays the role of the conduction zone of the crystal lattice of a metal. But if a defect - carbon atom with saturated bonds - meets in the lattice, electrical conductivity disappears. So the question arises: how to achieve homogeneity in thin polymer fibers? To do this, acetylene of a specially selected catalyst was polarized on the plastic. As a result, all carbon chains were oriented in the same direction (semiconductor), the number of defects decreased. The resulting polyacetylene was dipped for an hour in iodine solution in carbon tetrachloride and oxidized. The polymer began to conduct current better than copper. However, iodine is activated in the light, the saturation of the bonds between the carbon atoms is broken and already in a week the insulation resistance increased by 30%.