Viscosity of gaseous HFC-143a (1,1,1-trifluoroethane) under high pressures

The viscosity of gaseous HFC-143a(1,1,1-trifluoroethane) was measured with an oscillating-disk viscometer of the Maxwell type at temperatures from 298 .15 to 423.15 K and at pressures up to the saturated vapor pressure at each temperature under subcritical conditions or up to 9 MPa under supercritica l conditions. Intermolecular potential parameters of HFC-143a for the exten ded corresponding states were determined from the viscosity data at 0.1 MPa . An empirical viscosity equation as functions of temperature and density i s proposed to interpolate the present experimental results.