The surface tensions of 1,1,1,2,2,3,3,4,4-nonafluorohexane (CF
3CF
2CF
2CF
2CH
2CH
3) and 1,1,2,2-tetrafluoroethyl-2,2,2-trifluoro-ethyl ether (CHF
2CF
2OCH
2CF
3), which are potential alternatives to HCFC solvents, were measured by the differential capillary-rise method. 20 data points for 1,1,1,2,2,3,3,4,4-nonafluorohexane and 17 data points for 1,1,2,2-tetrafluoroethyl-2,2,2-trifluoroethyl ether were obtained in the temperature range of 289–348 K. The experimental uncertainties of temperature and surface tension measurements were estimated to be within 20 mK and 0.14 mN·m
−1, respectively. Surface tension correlations for 1,1,1,2,2,3,3,4,4-nonafluorohexane and 1,1,2,2-tetrafluoroethyl-2,2,2-trifluoroethyl ether were formulated and were found to reproduce the present data within the limits of experimental uncertainty.
View full abstract