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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

Authors: Xin Li, Shi-Qing Wang

Published in: Rheologica Acta | Issue 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.

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Title: Elastic yielding after step shear and during LAOS in the absence of meniscus failure
Authors: Xin Li
Shi-Qing Wang
Publication date: 01-10-2010
Publisher: Springer-Verlag
Published in: Rheologica Acta / Issue 10/2010
Print ISSN: 0035-4511
Electronic ISSN: 1435-1528
DOI: https://doi.org/10.1007/s00397-010-0465-6

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