Structure-Property Relationships via Recovery Rheology in Viscoelastic Materials

Johnny Ching Wei Lee, Katie M. Weigandt, Elizabeth G. Kelley, Simon A. Rogers

Research output: Contribution to journalArticlepeer-review

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.

Original languageEnglish (US)
Article number248003
JournalPhysical review letters
Volume122
Issue number24
DOIs
StatePublished - Jun 19 2019

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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