Abstract
The frequency-dependent viscoelastic shear modulus of concentrated suspensions of colloidal hard spheres is shown to be strongly modified as the volume fraction approaches the glass transition. The elastic or storage component, , becomes larger than the viscous or loss component, . The frequency dependence of develops a plateau while that of develops a minimum. We propose a physical model to account for these data, using a description of the glasslike behavior based on mode-coupling theory, and a description of the high-frequency behavior based on hydrodynamic flow calculations.
- Received 3 April 1995
DOI:https://doi.org/10.1103/PhysRevLett.75.2770
©1995 American Physical Society