IR spectroscopy is used to study ion-molecule interactions in macromolecular ionic solutions of lithium salts (LiClO4, LiCF3SO3, LiAsF6) in an acrylonitrile-butadiene (SKN-40) copolymer. There is a correlation between ion-molecule interactions and the electrical conductivity, measured by the method of electrochemical impedance in the temperature range 20-100°C. The processes of ionic solvation in SKN-40 and acetonitrile, a nonaqueous liquid solvent of similar chemical nature, are similar. It was also shown that small amounts of methyl ethyl ketone influence ionic transport in SKN-40.