TRANSPORT-PROPERTIES OF NONELECTROLYTE LIQUID-MIXTURES .8. VISCOSITY COEFFICIENTS FOR TOLUENE AND FOR 3 MIXTURES OF TOLUENE + HEXANE FROM 25 TO 100-DEGREES-C AT PRESSURES UP TO 500-MPA

Viscosity coefficients measured using a two-coil self-centering falling-body viscometer are reported for toluene and three binary mixtures of toluene + n-hexane at 25, 50, 75, and 100-degrees-C at pressures up to 500 MPa. The data for a given composition at different temperatures and pressures are correlated very satisfactorily by a plot of reduced viscosity eta* versus log V', where V' = V.V(O)(T(R))/V(O)(T) and V(O) represents a characteristic volume. The binary mixture data are well represented by the Grunberg and Nissan equation with a mixing parameter which is pressure dependent but composition and temperature independent.