THE INFLUENCE OF THE H/D SUBSTITUTION ON THE VISCOSITY IN ACETONITRILE-DECANOL SOLUTION NEAR THE CRITICAL POINT

A. Milewska, J. Szydłowski

Department of Chemistry, University of Warsaw, Zwirki i Wigury 101 Str., 02-089 Warsaw, Poland


Results of measurements of the temperature and concentration dependence of the kinematic viscosity of the mixture of acetonitrile/decanol, acetonitrile-d3/decanol and acetonitrile/decanol-d using an optoelectronic capillary viscometer are reported. In all cases very weak divergence of the viscosity is observed while approaching the critical point. Concentration dependences also show weak anomalous behavior in the close vicinity of the critical temperature. Large isotope effect on viscosity is found and shortly discussed.