Specific Features of the Obtainment of Imide Forming Copolymers of Acrylonitrile and Methacrylic Acid in Concentrated Solutions of N-Substituted Amides

A radical copolymerization of acrylonitrile and methacrylic acid in concentrated solutions of N-substituted amides is studied. The influence of the structure and concentration of amides on the microstructure and properties of copolymers is established. The conditions for the synthesis of copolymers of acrylonitrile and methacrylic acid are determined making it possible to obtain foamed poly(meth)acrylimide with an isotropic structure and high physical and mechanical parameters on their basis.