TY CONF TI WOOD-POLYMER COMPOSITE MATERIAL KW Polyurethane foam KW polymers KW foaming KW board KW wood JO Ecological and resource-saving technologies in science and technology AU Safin, R.G. AU Fahrutdinov, R.R. PY 2022 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov