Communication: Correlation of terminal relaxation rate and viscosity enhancement in supramolecular small-molecule liquids

S. P. Bierwirth; C. Gainaru; R. Böhmer

doi:10.1063/1.5037803

Communication: Correlation of terminal relaxation rate and viscosity enhancement in supramolecular small-molecule liquids

S. P. Bierwirth, C. Gainaru, R. Böhmer

Research output: Contribution to journal › Article › peer-review

17 Scopus citations

Abstract

Monohydroxy alcohols with a large supramolecular Debye-type dielectric process often exhibit a significant decoupling between the Debye mode and the structural relaxation. Using shear rheology, a technique that is sensitive to both processes as well, the current work reveals a widely applicable correlation in terms of the dynamical onset and the viscosity enhancement of the supramolecular shear mode with respect to the structural relaxation. Rheological data from an array of about 50 oligomers, associating polymers, (polymerized) ionic liquids, and aqueous solutions corroborate this correlation which thus appears to be generic to many classes of complex fluids.

Original language	English
Article number	221102
Journal	Journal of Chemical Physics
Volume	148
Issue number	22
DOIs	https://doi.org/10.1063/1.5037803
State	Published - Jun 14 2018
Externally published	Yes

Funding

We thank the Deutsche Forschungsgemeinschaft, Grant No. BO1301/14-1, for financially supporting this project.

Funders	Funder number
Deutsche Forschungsgemeinschaft

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10.1063/1.5037803

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abstract = "Monohydroxy alcohols with a large supramolecular Debye-type dielectric process often exhibit a significant decoupling between the Debye mode and the structural relaxation. Using shear rheology, a technique that is sensitive to both processes as well, the current work reveals a widely applicable correlation in terms of the dynamical onset and the viscosity enhancement of the supramolecular shear mode with respect to the structural relaxation. Rheological data from an array of about 50 oligomers, associating polymers, (polymerized) ionic liquids, and aqueous solutions corroborate this correlation which thus appears to be generic to many classes of complex fluids.",

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AU - Böhmer, R.

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AB - Monohydroxy alcohols with a large supramolecular Debye-type dielectric process often exhibit a significant decoupling between the Debye mode and the structural relaxation. Using shear rheology, a technique that is sensitive to both processes as well, the current work reveals a widely applicable correlation in terms of the dynamical onset and the viscosity enhancement of the supramolecular shear mode with respect to the structural relaxation. Rheological data from an array of about 50 oligomers, associating polymers, (polymerized) ionic liquids, and aqueous solutions corroborate this correlation which thus appears to be generic to many classes of complex fluids.

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Communication: Correlation of terminal relaxation rate and viscosity enhancement in supramolecular small-molecule liquids

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