Structure-property relationships via recovery rheology in viscoelastic materials
arXiv:1905.07849 · doi:10.1103/PhysRevLett.122.248003
Abstract
The recoverable strain is shown to correlate to the temporal evolution of microstructure via time-resolved small-angle neutron scattering (SANS) 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.
7 pages, 3 figures (plus Supplemental Material)
References in corpus (5)
- Fingerprinting Soft Materials: A Framework for Characterizing Nonlinear Viscoelasticity
- Strain-induced alignment in collagen gels
- Three-dimensional imaging of colloidal glasses under steady shear
- Creep and flow of glasses: strain response linked to the spatial distribution of dynamical heterogeneities
- Start-up Shear of Concentrated Colloidal Hard Spheres: Stresses, Dynamics and Structure