Callaghan Innovation Research Papers

Back to Research Papers

TitleRelative permittivity measurements of trifluoromethyl methyl ether and pentafluoroethyl methyl ether
Publication TypeJournal Article
Year of Publication2007
AuthorsEltringham, W., and Catchpole O.J.
JournalJournal of Chemical and Engineering Data
Pagination1095 - 1099
Date Published2007
ISSN00219568 (ISSN)
KeywordsDensity (specific gravity), Dipole moment, Ethers, Molecular polarity, Molecular polarizability, Pentafluoroethyl methyl ether, Permittivity measurement, Relative permittivity, Trifluoromethyl methyl ether
AbstractThe relative permittivities (εr) 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 (ρr) using the function (εr - 1)/(2εr + 1). The apparent dipole moment (μ*) of the liquid phase was calculated for each fluid using Kirkwood's theory of molecular polarizability. © 2007 American Chemical Society.

Back to top