TY JOUR TI COPOLYMERS OF 4-VINYLPYRIDINE AND SODIUM STYRENE SULPHONATE KW radical copolymerization KW sodium styrene sulfonate KW 4-vinylpyridine KW relative activity constants JO Modern Technologies and Scientific and Technological Progress AU Raskulova, T.V. AU Sazonov, A.O. AU Kulshrestha, V.. PY 2025 IS 2025 PB Federal State Funded Educational Establishment of Higher Education «Angarsk State Technical University»