We report measurements of the viscosity of liquid di-isodecyl phthalate (DIDP) and a correlation determined therefrom. The viscosity of DIDP was measured at temperatures between (298.15 and 373.15) K and pressures between (0.1 and 140) MPa with a relative uncertainty of 2 % by means of a new vibrating-wire viscometer. Additional measurements were made at a constant pressure of 0.1 MPa in the temperature range (274.07 to 368.21) K by means of capillary viscometers, with a relative uncertainty of 1 %. The results have been represented by a correlating equation containing six adjustable parameters with an average absolute relative deviation of 0.9 % and a maximum absolute relative deviation of 2.9 %. The available literature data are found to be generally in good agreement with our correlation at temperatures between (293 and 373) K at pressures up to 140 MPa, even when the corresponding viscosity is up to a factor of 10 greater than the largest viscosity measured in this work. A two-parameter correlation for the viscosity of DIDP at p = 0.1 MPa is also presented that represents the present results and selected data from the literature with an absolute relative deviation of 0.5 % and a maximum absolute relative deviation of 1.7 % at temperatures of (273 to 369) K. Viscosities of 1-methylnaphthalene at T = 298.15 K and pressures up to 140 MPa were also measured for purposes of verification.
Compounds
#
Formula
Name
1
C28H46O4
3-methylnonyl 1,2-benzenedioate
2
C11H10
1-methylnaphthalene
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.