VISCOSITY OF THE SATURATED LIQUID-PHASE OF 6 HALOGENATED COMPOUNDS AND 3 MIXTURES

Data are reported for the viscosity of six saturated liquids and three mixtures of these liquids over a temperature range from 250 to 330 K. The liquids studied are the halogenated compounds 1,1,1,2 tetrafluoroethane (R134a), bis(difluoromethyl) ether (RE134), 2-(difluoromethoxy)-1,1,1-trifluoroethane (RE245), pentafluoroethane (R125), 1-chloro-1,2,2,2-tetrafluoroethane (R124), and difluoromethane (R32). The mixtures studied are R125 + R134a, R32 + R134a, and R32 + R124, all at approximately 50% mole fraction. A capillary viscometer constructed of stainless steel and sapphire was used to obtain the data. The measurements are accurate to 3-5% of the kinematic viscosity. A free volume model of viscosity was used to correlate the data.