TY JOUR TI USING OF SECONDARY RAW MATERIALS IN THE POLYMER FILMS PRODUCTION KW polymer materials KW modification KW recycled polymers JO Modern Technologies and Scientific and Technological Progress AU Genenko, N.I. AU Chernigovskaya, M.A. PY 2023 IS 2023 PB Federal State Funded Educational Establishment of Higher Education «Angarsk State Technical University»