Hydrolyzed Natural Flavonoids of Plant Raw Materials Obtaining and Application Possibilities as Antioxidants of Synthetic Polymer Materials

conducting research on the possibility of using flavonoid compounds of plant raw materials with hydrophobic properties as inhibitors of oxidative processes of hydrophobic high-molecular compounds. To solve this problem, a method has been developed for obtaining polyphenols with increased hydrophobic properties from flavonoid-containing plant raw materials using the hydrolysis reaction of the glycoside bond between polyphenolic aglycone and carbohydrate fragments of molecules of natural hydrophilic flavonoids. By the method of thin-layer chromatography on silica gel plates with eluents of different polarities, various hydrophobic-hydrophilic properties of glycosidized and aglycone structures of hydrolyzed flavonoid molecules of vegetable raw materials are shown. The antioxidant properties of glycosidized and hydrolyzed flavonoid molecules associated with the presence of phenolic hydroxyl groups in their structure were determined by the amperometric method of analyzing antioxidant activity according to L.Ya. Yashin. Studies have shown that the use of hydrolyzed natural flavonoids with hydrophobic properties as additives to hydrophobic butadiene-nitrile rubber makes it possible to preserve such physical properties of the polymer as strength and elongation under tension before and after oxidative processes during heat treatment at elevated temperatures and UV irradiation in the presence of oxygen in the air.