Shear banding and rheochaos in associative polymer networks | Zendy

Joris Sprakel | Zendy; Evan Spruijt | Zendy; Martien A. Cohen Stuart | Zendy; N. A. M. Besseling | Zendy; M. P. Lettinga | Zendy; Jasper van der Gucht | Zendy

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Shear banding and rheochaos in associative polymer networks

Author(s) -

Joris Sprakel,

Evan Spruijt,

Martien A. Cohen Stuart,

N. A. M. Besseling,

M. P. Lettinga,

Jasper van der Gucht

Publication year - 2008

Publication title -

soft matter

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.99

H-Index - 170

eISSN - 1744-6848

pISSN - 1744-683X

DOI - 10.1039/b803085e

Subject(s) - shear (geology) , instability , shear rate , chaotic , velocimetry , shear stress , associative property , materials science , shear flow , mechanics , transient (computer programming) , polymer , rheology , physics , composite material , computer science , mathematics , artificial intelligence , pure mathematics , operating system

We present experimental evidence of an instability in the shear flow of transient networks formed by telechelic associative polymers. Velocimetry experiments show the formation of shear bands, following a complex pattern upon increasing the overall shear rate. The chaotic nature of the stress response in transient flow is indicative of spatiotemporal fluctuations of the banded structure. This is supported by time-resolved velocimetry measurements.

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