THE NATURE OF COLOR-CENTERS IN HYDROLYZED POLYMETHACRYLONITRILE

Using UV-spectroscopy, we have investigated the reactions proceeding i n polymethacrylonitrile under alkali influence. It is shown that a dee ply colored solution of the polymer becomes water soluble, therefore t he cycles cannot be absorbing structures, as it is generally assumed. We have suggested that nitrile groups turn into carboxylates and acid groups under aqueous alkali influence. The coloration of the polymer s olution is due to the formation of ionic pair multiplets. The features of their formation and destruction in various solvents are discussed.