TY JOUR TI PROPERTIES OF COMPOSITE MATERIALS BASED ON MIXTURES OF EPOXY POLYMERS AND OLIGOSULFONES. PART 4. ADHESION PROPERTIES KW epoxy resin KW hardener KW oligosulfones KW terminal carboxyl and phenolic groups KW modification KW adhesion properties JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Kochergin, Y.S. AU Grigorenko, T.I. AU Zolotareva, V.V. PY 2020 IS 5 PB Belgorod State Technological University named after V.G. Shukhov