Stukalin, E.
, Douglas, J.
and Freed, K.
(2008),
Multi-Step Relaxation in Equilibrium Self-Assembling Solutions: A General Model of Relaxation in 'Complex' Fluids, Journal of Chemical Physics, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=853579
(Accessed December 30, 2024)
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Multi-Step Relaxation in Equilibrium Self-Assembling Solutions: A General Model of Relaxation in 'Complex' Fluids
Published
Author(s)
Evgeny B. Stukalin, , Karl Freed
Abstract
We examine the rheological and dielectric properties of a solution of equilibrium self-assembling particles that form polydisperse chains whose average length depends on temperature and concentration (free association model). Relaxation of the self-assembling clusters proceeds by motions associated either with cluster rotations, diffusive internal chain dynamics, or with inter-chain entanglement interactions. This internal relaxation in these complex fluids is decribed using the following hierarchy of models to emphasize different physical effects: unentangled rod-like clusters, unentangled flexible polymers, and entangled chains. All the models yield a multi-step relaxation for low polymer scission rates ( persistent polymers ).Citation
Journal of Chemical Physics
Volume
129
Pub Type
Journals
Download Paper
Keywords
complex fluids, dielectric relaxation, equilbrium polymerization, multi-step relaxation, non-Arrhenius relaxation, self-assembly, stress relaxation
Citation
Issues
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Created September 4, 2008, Updated October 12, 2021