Structure-Property Relationships via Recovery Rheology in Viscoelastic Materials

Johnny Ching-Wei Lee, Katie M. Weigandt, Elizabeth G. Kelley, and Simon A. Rogers
Phys. Rev. Lett. 122, 248003 – Published 19 June 2019
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Abstract

The recoverable strain is shown to correlate to the temporal evolution of microstructure via time-resolved small-angle neutron scattering and dynamic shear rheology. Investigating two distinct polymeric materials of wormlike micelles and fibrin network, we demonstrate that, in addition to the nonlinear structure-property relationships, the shear and normal stress evolution is dictated by the recoverable strain. A distinct sequence of physical processes under large amplitude oscillatory shear (LAOS) is identified that clearly contains information regarding both the steady-state flow curve and the linear-regime frequency sweep, contrary to most interpretations that LAOS responses are either distinct from or somehow intermediate between the two cases. This work provides a physically motivated and straightforward path to further explore the structure-property relationships of viscoelastic materials under dynamic flow conditions.

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  • Received 4 October 2018
  • Revised 15 April 2019

DOI:https://doi.org/10.1103/PhysRevLett.122.248003

© 2019 American Physical Society

Physics Subject Headings (PhySH)

Polymers & Soft Matter

Authors & Affiliations

Johnny Ching-Wei Lee1, Katie M. Weigandt2, Elizabeth G. Kelley2, and Simon A. Rogers1,*

  • 1Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, Illinois 61801, USA
  • 2Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA

  • *sarogers@illinois.edu

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Issue

Vol. 122, Iss. 24 — 21 June 2019

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