VISCOSITY OF 1,1,1,2,3,3-HEXAFLUOROPROPANE AND 1,1,1,3,3,3-HEXAFLUOROPROPANE AT SATURATED LIQUID CONDITIONS FROM 262 K TO 353 K

Viscosities are reported for two fluorinated propane isomers in the sa turated-liquid state at temperatures from 262 K to 353 K. The compound s are 1,1,1,2,3,3-hexafluoropropane (R236ea) and 1,1,1,3,3,3-hexafluor opropane (R236fa). The measurements were performed in a capillary visc ometer designed for fluids with vapor pressures above ambient. The est imated uncertainty of the viscosity measurements is +/-3%. A free-volu me model was used to correlate the experimental results, and they were also compared with predictions from an extended corresponding states model.