Unveiling Temporal Nonlinear Structure-Rheology Relationships under Dynamic Shearing.

ABSTRACT: Understanding how microscopic rearrangements manifest in macroscopic flow responses is one of the central goals of nonlinear rheological studies. Using the sequence-of-physical-processes framework, we present a natural 3D structure-rheology space that temporally correlates the structural and nonlinear viscoelastic parameters. Exploiting the rheo-small-angle neutron scattering (rheo-SANS) techniques, we demonstrate the use of the framework with a model system of polymer-like micelles (PLMs), where we unveil a sequence of microscopic events that micelles experience under dynamic shearing across a range of frequencies. The least-aligned state of the PLMs is observed to migrate from the total strain extreme toward zero strain with increasing frequency. Our proposed 3D space is generic, and can

SUBMITTER: Lee JC 

PROVIDER: S-EPMC6680679 | biostudies-literature | 2019 Jul

REPOSITORIES: biostudies-literature