Hard sphere colloidal dispersions: Mechanical relaxation pertaining to thermodynamic forces

J. Mellema, C.G. de Kruif, C. Blom, A. Vrij

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The complex viscosity of sterically stabilized (hard) silica spheres in cyclohexane has been measured between 80 Hz and 170 kHz with torsion pendulums and a nickel tube resonator. The observed relaxation behaviour can be attributed to the interplay of hydrodynamic and thermodynamic forces. The validity of the Cox-Merz rule is checked.
Original languageEnglish
Pages (from-to)40-44
JournalRheologica acta
Issue number1
Publication statusPublished - 1987


  • linear viscoelasticity
  • Complex viscosity
  • Cox-Merz rule
  • Hard sphere
  • Thermodynamic force

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