Predictive relation for the α-relaxation time of a coarse-grained polymer melt under steady shear.
Journal
Science advances
ISSN: 2375-2548
Titre abrégé: Sci Adv
Pays: United States
ID NLM: 101653440
Informations de publication
Date de publication:
Apr 2020
Apr 2020
Historique:
received:
09
08
2019
accepted:
27
01
2020
entrez:
5
6
2020
pubmed:
5
6
2020
medline:
5
6
2020
Statut:
epublish
Résumé
We examine the influence of steady shear on structural relaxation in a simulated coarse-grained unentangled polymer melt over a wide range of temperature and shear rates. Shear is found to progressively suppress the α-relaxation process observed in the intermediate scattering function, leading ultimately to a purely inertially dominated β-relaxation at high shear rates, a trend similar to increasing temperature. On the basis of a scaling argument emphasizing dynamic heterogeneity in cooled liquids and its alteration under material deformation, we deduce and validate a parameter-free scaling relation for both the structural relaxation time τ
Identifiants
pubmed: 32494635
doi: 10.1126/sciadv.aaz0777
pii: aaz0777
pmc: PMC7182423
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
eaaz0777Informations de copyright
Copyright © 2020 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).
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