An empirical constitutive law for concentrated colloidal suspensions in the approach of the glass transition

Concentrated, non-crystallizing colloidal suspensions in their approach of the glass state exhibit distinct dynamics patterns. These patterns suggest a powerlaw rheological constitutive model for near-glass viscoelasticity, as presented here. The rheological parameters used for this model originate...

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Bibliographic Details
Published in:Rheologica acta 2009-08, Vol.48 (7), p.747-753
Main Authors: Winter, H. Henning, Siebenbürger, Miriam, Hajnal, David, Henrich, Oliver, Fuchs, Matthias, Ballauff, Matthias
Format: Article
Language:English
Subjects:
Applied sciences
Characterization and Evaluation of Materials
Chemistry and Materials Science
Colloids
Complex Fluids and Microfluidics
Constitutive models
Exact sciences and technology
Food Science
Gelation
Glass
Materials Science
Mathematical models
Mechanical Engineering
Organic polymers
Original Contribution
Physicochemistry of polymers
Polymer Sciences
Properties and characterization
Rheological properties
Rheology
Rheology and viscoelasticity
Shear viscosity
Soft and Granular Matter
Viscoelasticity
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Summary:Concentrated, non-crystallizing colloidal suspensions in their approach of the glass state exhibit distinct dynamics patterns. These patterns suggest a powerlaw rheological constitutive model for near-glass viscoelasticity, as presented here. The rheological parameters used for this model originate in the mode-coupling theory. The proposed constitutive model provides explicit expressions for the steady shear viscosity, the steady normal stress coefficient, the modulus-compliance relation, and the α peak of G ″. The relaxation pattern distinctly differs from gelation.
ISSN:0035-4511
1435-1528
DOI:10.1007/s00397-009-0377-5