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Viscoelasticity and shear flow of concentrated,noncrystallizing colloidal suspensions: Comparison with mode-coupling theory

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2009

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Siebenbürger, Miriam
Winter, Henning
Ballauff, Matthias

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http://nbn-resolving.de/urn:nbn:de:bsz:352-opus-109515
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https://doi.org/10.1122/1.3093088
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Journal of Rheology. 2009, 53(3), pp. 707-726. Available under: doi: 10.1122/1.3093088

Zusammenfassung

We present a comprehensive rheological study of a suspension of thermosensitive particles dispersed in water. The volume fraction of these particles can be adjusted by the temperature of the system in a continuous fashion. Due to the finite polydispersity of the particles (standard deviation: 17%), crystallization is suppressed and no fluid-crystal transition intervenes. Hence, the moduli G' and G" in the linear viscoelastic regime as well as the flow curves (shear stress σ(γ) as function of the shear rate γ) could be measured in the fluid region up to the vicinity of the glass transition. Moreover, flow curves could be obtained over a range of shear rates of 8 orders of magnitude, while G' and G" could be measured spanning over 9 orders of magnitude. Special emphasis has been laid on precise measurements down to the smallest shear rates/frequencies. It is demonstrated that mode-coupling theory generalized in the integration through transients framework provides a full description of the flow curves as well as the viscoelastic behavior of concentrated suspensions with a single set of well-defined parameters.

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530 Physik

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ISO 690SIEBENBÜRGER, Miriam, Matthias FUCHS, Henning WINTER, Matthias BALLAUFF, 2009. Viscoelasticity and shear flow of concentrated,noncrystallizing colloidal suspensions: Comparison with mode-coupling theory. In: Journal of Rheology. 2009, 53(3), pp. 707-726. Available under: doi: 10.1122/1.3093088
BibTex
@article{Siebenburger2009Visco-9418,
  year={2009},
  doi={10.1122/1.3093088},
  title={Viscoelasticity and shear flow of concentrated,noncrystallizing colloidal suspensions: Comparison with mode-coupling theory},
  number={3},
  volume={53},
  journal={Journal of Rheology},
  pages={707--726},
  author={Siebenbürger, Miriam and Fuchs, Matthias and Winter, Henning and Ballauff, Matthias}
}
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