THE ACID-BASE PARAMETRS ON THE SURFACE OF URETHANE RUBBERS

The distribution of adsorption sites with persect to the acid–base type and intensity on the surface of urethane rubbers was studied by the indicator method with spectrophotometric determination of the amount of sites. Acid–base sites capable to act as active sites of adhesion interaction on the polymer surfaces were determined. All the surfaces studied are bifunctional and contain both base and acid sites, with the acid sites prevailing. The aqueous medium influences the activity of some of the revealed sites of the Brønsted: base site (C-O-C) and one of the acid sites (NН). The results obtained can serve as a basis for understanding the mechanism of adhesion interaction on the interface.

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