Correlation of the volumetric properties of fluorinated ethers by the group-contribution volume-ratio method

Abstract

(p, V, T) data obtained with simple volmnometers are usually restricted to a small range of temperatures below and above ambient temperature. The modified Tait equation has been very useful for extrapolating (p, V, T) data for individual liquids. The available volumetric data for fluorinated ethers is reviewed and is expressed as a correlation by using the Tait equation and the group-contribution volume-ratio method. Volume ratios obtained from this correlation used in combination with the densities of the liquid along the saturation boundary should provide the densities for a wide temperature and pressure range for the fluorinated ethers, including some which may be useful as longterm replacements for existing alternative refrigerants.