PECULIARITIES OF POLYACRYLONITRILE AND PO LYMETHACRYLONITRILE TRANSFORMATIONS IN SOLUTIONS UNDER THE INFLUENCE OF ORGANIC-BASES

Spectroscopic and viscometric techniques were employed to study cycliz ation involving AA groups of polyacrylonitrile and polymethacrylonitri le in solution. Sodium amylate was used as an agent to initiate the cy clization. Comparison of the changes in the electronic structure occur ring on addition of an alkali or sodium amylate to a solution of the p olymers allowed us to suggest that there existed two types of ionic st ructures. The absence of the coil - globule conformational transition when sodium amylate was used to initiate cyclization results from the fact that, in the absence of AA ions, it is not possible for primary c ross-links to form and promote the transition of macromolecules to a c ompact state.