ABSTRACT

Densities, speeds of sound, and isobaric specific heat capacities were measured for three polyol ester base oils and one fully-qualified lubricant. Density and speed of sound were measured at ambient pressure over the combined temperature range 278.15 K to 343.15 K. Heat capacity was measured over the combined temperature range 263.14 K to 492.15 K; the specific temperature range varied for each fluid and was selected to avoid potential phase transitions. Measurement results for these three properties, as well as calculated adiabatic compressibilities, have been reported. Experimental results for the four fluids were compared with one another and with available literature data.

Compounds

#	Formula	Name
1	C25H44O8	pentaerythritol tetrapentanoate
2	C33H60O8	pentaerythritol tetraheptanoate
3	C41H76O8	pentaerythritol tetranonanoate

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	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	14
POMD	1	Speed of sound, m/s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid Frequency, MHz; Liquid	Liquid	Single path-length method	14
POMD	1	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	DSC	170
POMD	2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	14
POMD	2	Speed of sound, m/s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid Frequency, MHz; Liquid	Liquid	Single path-length method	14
POMD	2	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	DSC	124
POMD	3	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	13
POMD	3	Speed of sound, m/s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid Frequency, MHz; Liquid	Liquid	Single path-length method	13
POMD	3	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	DSC	100

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

Density, Speed of Sound, and Heat Capacity Measurements of Polyol Ester Lubricants

Fortin, Tara J.

ABSTRACT