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Rheologica Acta

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01.10.2010 | Original Contribution

Elastic yielding after step shear and during LAOS in the absence of meniscus failure

verfasst von: Xin Li, Shi-Qing Wang

Erschienen in: Rheologica Acta | Ausgabe 10/2010

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Abstract

This work examines the possibility that the previously observed elastic yielding, i.e., nonquiescent relaxation after a large step shear (Ravindranath and Wang, Macromolecules 40:8031–8039, 2007) is due to an intrinsic experimental difficulty technically known as edge fracture. By redesigning the rheometric apparatus to eliminate edge failure, we show by an example of a well-entangled polymer solution that elastic yielding still occurs in the absence of any edge failure. We are also able to confirm that shear banding during large amplitude oscillatory shear (Ravindranath and Wang, J Rheol 52:341–358, 2008a) is an inherent rheological characteristic related to internal yielding of the entanglement network.

Nächster Artikel The effect of particle size and migration on the formation of flow-induced structures in viscoelastic suspensions

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Titel: Elastic yielding after step shear and during LAOS in the absence of meniscus failure
verfasst von: Xin Li
Shi-Qing Wang
Publikationsdatum: 01.10.2010
Verlag: Springer-Verlag
Erschienen in: Rheologica Acta / Ausgabe 10/2010
Print ISSN: 0035-4511
Elektronische ISSN: 1435-1528
DOI: https://doi.org/10.1007/s00397-010-0465-6

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