Flow-Induced Concentration Nonuniformity and Shear Banding in Entangled Polymer Solutions.

Burroughs, Michael C; Zhang, Yuanyi; Shetty, Abhishek M; Bates, Christopher M; Leal, L Gary; Helgeson, Matthew E

Burroughs, Michael C; Zhang, Yuanyi; Shetty, Abhishek M; Bates, Christopher M; Leal, L Gary; Helgeson, Matthew E.

Afiliación

Burroughs MC; Department of Chemical Engineering, University of California, Santa Barbara, Santa Barbara, California 93106, USA.
Zhang Y; Department of Chemical Engineering, University of California, Santa Barbara, Santa Barbara, California 93106, USA.
Shetty AM; Anton Paar USA, Inc., Ashland, Virginia 23005, USA.
Bates CM; Department of Chemical Engineering, University of California, Santa Barbara, Santa Barbara, California 93106, USA.
Leal LG; Department of Materials, University of California, Santa Barbara, Santa Barbara, California 93106, USA.
Helgeson ME; Department of Chemical Engineering, University of California, Santa Barbara, Santa Barbara, California 93106, USA.

Phys Rev Lett ; 126(20): 207801, 2021 May 21.

Article en En | MEDLINE | ID: mdl-34110187

ABSTRACT

ABSTRACT

Recent models have predicted entangled polymer solutions could shear band due to unstable flow-induced demixing. This work provides the first experimental probe of the in situ concentration profile of entangled polymer solutions under shear. At shear rates above a critical value, we show that the concentration and velocity profiles can develop bands, in quantitative agreement with steady-state model predictions. These findings highlight the critical importance of flow-concentration coupling in entangled polymer solutions.

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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Tipo de estudio: Prognostic_studies Idioma: En Revista: Phys Rev Lett Año: 2021 Tipo del documento: Article País de afiliación: Estados Unidos

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