Shear banding and rheochaos in associative polymer networks.
basic_science · Level V
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- Record sourced from PubMed, PMID 32907163.
- Also identified by DOI 10.1039/b803085e.
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Abstract
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.