Tesser, R.; Di Serio, M.; Gargiulo, R.; Basile, G.; Bragante, L.; Santacesaria, E.
Journal of Fluorine Chemistry 121 (2003) 15–22
In the present work, vapour-liquid equilibria of four binary systems refrigerant-lubricant oil have been investigated, CF 3 CHF 2 (R125), CF 3 CH 2 F (R134a), CF 3 CH 3 (R143a) and CH 2 F 2 (R32) as refrigerants and a commercial perfluoropolyether (PFPE), Fluorolink D10H, as lubricant. Vapour-liquid equilibrium data, consisting of isothermal measurement of equilibrium pressure at a fixed composition, have been correlated with an extended Flory-Huggins equation and the corresponding parameters have been determined. Good agreement has been found between experimental data and the model predictions