New experimental densities are reported for squalane and for branched pentaerythritol tetra(2- ethylhexanoate), PEB8, in the compressed liquid state over the temperature range from (278.15 to 353.15) K and for pressures up to 45 MPa. The reliability of the technique and the procedure up to 25 MPa has been verified in our previous works, and in the present work they were checked up to 45 MPa by comparing our experimental densities for heptane with literature data. A total of 297 density values have been measured with a high-pressure vibrating tube densimeter. The correction factor for density due to the sample viscosity has been considered. This factor ranges from 1 x 10-4 to 1 x 10-3 gacm-3 for PEB8 and from 4 x 10-5 to 6 x10-4 gacm-3 for squalane over the entire Tp interval. The pressure and temperature dependencies of squalane and PEB8 densities could be accurately represented by the Tammann-Tait equation with standard deviations of 3 x 10-5 gacm-3 for squalane and 9 ? 10-5 gacm-3 for PEB8. These density data were used to analyze the isothermal compressibility, the isobaric thermal expansivity, and the internal pressure of squalane and PEB8.
Compounds
#
Formula
Name
1
C30H62
2,6,10,15,19,23-hexamethyltetracosane
2
C7H16
heptane
3
C37H68O8
pentaerythritol tetra(2-ethylhexanoate)
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.