ABSTRACT

Experimental densities and viscosities for the binary mixtures of polyoxymethylene dimethyl ethers with different CH2O chain length n = 2, 3, 4 were measured over a temperature range of 288.15 K 313.15 K and at the atmospheric pressure of 0.1 MPa. It is found that the order of densities and viscosities for pure components is PODE2 less than PODE3 less than PODE4 at the same temperature. Meanwhile, for binary mixtures (PODE2- PODE3, PODE2-PODE4, PODE3-PODE4), the densities and viscosities decreased with the increase of mole fraction of light component. On the basis of experimental data, the excess molar volumes and the viscosity deviations for the binary mixtures were calculated and correlated by the Redlich-Kister equation, while the excess Gibbs energy of activation for binary mixtures (PODE2-PODE3, PODE2-PODE4, PODE3- PODE4) were also calculated and correlated. The results indicated that the difference of the CH2O chain length has a significant influence on the densities and viscosities of binary mixtures of polyoxymethylene dimethyl ethers.

Compounds

#	Formula	Name
1	C4H10O3	2,4,6-trioxaheptane
2	C5H12O4	2,4,6,8-tetraoxanonane
3	C6H14O5	2,4,6,8,10-pentaoxaundecane

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	Buoyancy - hydrostatic balance	1
POMD	1	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Concentric cylinders viscometry	6
POMD	1	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	6
POMD	2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Buoyancy - hydrostatic balance	1
POMD	2	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Concentric cylinders viscometry	6
POMD	2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	6
POMD	3	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Buoyancy - hydrostatic balance	1
POMD	3	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Concentric cylinders viscometry	6
POMD	3	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	6
POMD	1 2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	78
POMD	1 2	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid	Concentric cylinders viscometry	78
POMD	1 3	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	66
POMD	1 3	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid	Concentric cylinders viscometry	66
POMD	3 2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Mole fraction - 2; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	78
POMD	3 2	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid Mole fraction - 2; Liquid	Pressure, kPa; Liquid	Liquid	Concentric cylinders viscometry	66

Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Densities and viscosities for binary mixtures of polyoxymethylene dimethyl ethers with different CH2O chain length n = 2, 3, 4 at different temperatures

Liu, Q.[Quanjie], Zhang, X.[Xinwei], Ma, B.[Bo], Lin, Y.[Yanni]

ABSTRACT