TY JOUR TI THERMODYNAMICS OF FORMATION OF MODEL FRAGMENTS OF ION-EXCHANGE MEMBRANES BASED ON A COPOLYMER OF STYRENE SULFONIC ACID AND N-VINYLYMIDAZOLE IN THE FRAMEWORK OF COMPUTER SIMULATION KW composite membrane materials KW copolymers KW styrene sulfonic acid KW nitrogen-containing hetero-cyclic compounds KW quantum chemical modeling KW density functional theory KW change in the Gibbs energy of reaction JO Bulletin of the Angarsk State Technical University AU Fomina, L.V. AU Ryabykh, A.V. AU Beznosyuk, S.A. PY 2025 IS 1 PB Federal State Funded Educational Establishment of Higher Education «Angarsk State Technical University»