Thermodynamics Research Center / ThermoML | Fluid Phase Equilibria

Self-diffusivity measurements of dimethyl, diethyl, dipropyl, dibutyl, Bis(2-ethylhexyl) adipates from (293 - 339) K by a PGSE-NMR spin-echo technique

Ascenso, J. R.[Jose R.], Rubio, G.[Guilherme], Diogo, J. C. F.[Joao C. F.], Avelino, H. M. N. T.[Helena M. N. T.], Caetano, F. J. P.[Fernando J. P.], Fareleira, J. M. N. A.[Joao M. N. A.]
Fluid Phase Equilib. 2016, 410, 37-41
ABSTRACT
The article reports self-diffusivity measurements of dimethyl (DMA), diethyl (DEA), dipropyl (DPA), dibutyl (DBA), and bis(2-ethylhexyl) (DEHA) adipates from (293 - 339) K by the PGSE-NMR technique. The expanded uncertainty of the results is estimated to better than +-2%. The results are interpreted in terms of the hydrodynamic and the van der Waals radii. The former are calculated a Stokes-Einstein- Sutherland-type equation, using recently published viscosity data. Furthermore, recently published density data for those adipates are used to calculate the hard sphere radii at contact in a cubic lattice, in order to compare the radii obtained from transport properties with those obtained from equilibrium data. In this temperature range the self-diffusivities of the liquid dialkyl adipates studied have an Arrhenius-like behavior.
Compounds
# Formula Name
1 C8H14O4 dimethyl 1,6-hexanedioate
2 C10H18O4 diethyl hexanedioate
3 C12H22O4 dipropyl hexanedioate
4 C14H26O4 dibutyl hexanedioate
5 C22H42O4 bis(2-ethylhexyl) adipate
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
  • Self diffusion coefficient, m2/s ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • NMR spin-echo technique
  • 6
  • POMD
  • 2
  • Self diffusion coefficient, m2/s ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • NMR spin-echo technique
  • 6
  • POMD
  • 3
  • Self diffusion coefficient, m2/s ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • NMR spin-echo technique
  • 6
  • POMD
  • 4
  • Self diffusion coefficient, m2/s ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • NMR spin-echo technique
  • 6
  • POMD
  • 5
  • Self diffusion coefficient, m2/s ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • NMR spin-echo technique
  • 6