ABSTRACT

The viscosities of the esters 2-ethylhexyl benzoate (EHB), bis(2-ethylhexyl) phthalate (DEHP), and the long-chain hydrocarbon 2,6,10,15,19,23-hexamethyltetracosane (squalane, C30H62) have been measured between (0 and 80) deg C with a falling-body viscometer to a maximum pressures of (315, 371, and 379) MPa, respectively. The expanded uncertainty is estimated at +- 2 %. These substances are possible alternatives to diisodecyl phthalate (DIDP) as reference materials for viscometry at moderate to high pressures. In addition, further measurements for DIDP are reported in the range (0.1 to 90) MPa and (25 to 75) deg C to supplement those given by Harris and Bair (J. Chem. Eng. Data, 2007, 52, 272-278). These are compared with vibrating-wire measurements reported by Al Motari et al. (J. Chem. Eng. Data, 2007, 52, 1233-1239). The data have also been fitted as a function of the quantity (TV?) using the thermodynamic scaling method of Roland et al. (J. Chem. Phys. 2006, 125, 124508-1-124508-8), yielding scaling parameters, ?, equal to 3.69, 3.65, 4.16, and 3.96 for EHB, DEHP, squalane, and DIDP, respectively.

Compounds

#	Formula	Name
1	C15H22O2	2-ethylhexyl benzoate
2	C24H38O4	bis(2-ethylhexyl) 1,2-benzenedicarboxylate
3	C30H62	2,6,10,15,19,23-hexamethyltetracosane
4	C28H46O4	3-methylnonyl 1,2-benzenedioate

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	VIBTUB:UFactor:4	13
POMD	1	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Falling or rolling sphere viscometry	81
POMD	2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	VIBTUB:UFactor:3	12
POMD	2	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Falling or rolling sphere viscometry	86
POMD	3	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	VIBTUB:UFactor:4	12
POMD	3	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Falling or rolling sphere viscometry	143
POMD	4	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Falling or rolling sphere viscometry	57

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

Temperature and Pressure Dependence of the Viscosities of 2-Ethylhexyl Benzoate, Bis(2-ethylhexyl) Phthalate, 2,6,10,15,19,23-Hexamethyltetracosane (Squalane), and Diisodecyl Phthalate

Harris, K. R.[Kenneth R.]

ABSTRACT