Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

Relative Permittivity Measurements of Trifluoromethyl Methyl Ether and Pentafluoroethyl Methyl Ether

Eltringham, W.[Wayne], Catchpole, O. J.[Owen J.]
J. Chem. Eng. Data 2007, 52, 3, 1095-1099
ABSTRACT
The relative permittivities ( r) of trifluoromethyl methyl ether (HFE 143a) and pentafluoroethyl methyl ether (HFE 245mc) were measured as a function of temperature and pressure: (303 to 383) K and (1.5 to 31.6) MPa for HFE 143a and (313 to 323) K and (1.5 to 28.4) MPa for HFE 245mc. The relative permittivity was fitted to the reduced density (Fr) using the function ( r - 1)/(2 r + 1). The apparent dipole moment (i*) of the liquid phase was calculated for each fluid using Kirkwood s theory of molecular polarizability.
Compounds
# Formula Name
1 C2H3F3 1,1,1-trifluoroethane
2 C3H3F5O methyl pentafluoroethyl ether
Datasets
The table above is generated from the ThermoML associated json file (link above). POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied; the numbers refer to the table of compounds on the left.
Type Compound-# Property Variable Constraint Phase Method #Points
  • POMD
  • 1
  • Relative permittivity at various frequencies ; Fluid (supercritical or subcritical phases)
  • Temperature, K; Fluid (supercritical or subcritical phases)
  • Pressure, kPa; Fluid (supercritical or subcritical phases)
  • Frequency, MHz; Fluid (supercritical or subcritical phases)
  • Fluid (supercritical or subcritical phases)
  • Parallel plate capacitor
  • 136
  • POMD
  • 2
  • Relative permittivity at various frequencies ; Fluid (supercritical or subcritical phases)
  • Temperature, K; Fluid (supercritical or subcritical phases)
  • Pressure, kPa; Fluid (supercritical or subcritical phases)
  • Frequency, MHz; Fluid (supercritical or subcritical phases)
  • Fluid (supercritical or subcritical phases)
  • Parallel plate capacitor
  • 38