Viscoelastic behavior of an ordering latex suspension in a steady shear flow

B. van der Vorst; D. van den Ende; N. A. Tekin; J. Mellema

doi:10.1103/PhysRevE.57.3115

Viscoelastic behavior of an ordering latex suspension in a steady shear flow

B. van der Vorst, D. van den Ende, N. A. Tekin, and J. Mellema

Phys. Rev. E 57, 3115 – Published 1 March 1998

Abstract

The linear viscoelastic behavior of an ordering polystyrene latex during steady shear flow has been investigated. In this study a home-made instrument has been used that superimposes a small-amplitude oscillatory shear orthogonal onto the steady shear flow. The measurements can be interpreted as due to the coexistence of two phases under flow. For increasing shear rate the ordered (or solidlike) phase melts away until the suspension becomes completely disordered (or fluidlike). A model is presented in which the fluid is conceived as a viscoelastic matrix containing spherical viscoelastic domains. The model predicts a similar linear viscoelastic behavior of sheared lattices as found experimentally. The resulting parameters give information about the microstructure of the dispersion under shear flow.

Received 16 September 1997

DOI:https://doi.org/10.1103/PhysRevE.57.3115

Authors & Affiliations

B. van der Vorst, D. van den Ende^*, N. A. Tekin, and J. Mellema

J.M. Burgerscentrum, Rheology Group, Department of Applied Physics, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands

^*Author to whom correspondence should be addressed.

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Vol. 57, Iss. 3 — March 1998

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