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Hard sphere colloidal dispersions: Mechanical relaxation pertaining to thermodynamic forces |
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| Authors: | J Mellema C G de Kruif C Blom A Vrij |
| Institution: | (1) Rheology Group, Department of Applied Physics, Twente University of Technology, Postbus 217, NL-7500 AE Enschede, The Netherlands;(2) Van't Hoff Laboratory for Physical and Colloid Chemistry, University of Utrecht, Padualaan 8, NL-3584 CH Utrecht, The Netherlands |
| Abstract: | 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. |
| Keywords: | Hard sphere complex viscosity linear viscoelasticity thermodynamic force Cox-Merz rule |
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