Topological Linking Drives Anomalous Thickening of Ring Polymers in Weak Extensional Flows
Abstract
Molecular dynamics simulations confirm recent extensional flow experiments showing ring polymer melts exhibit strong extension-rate thickening of the viscosity at Weissenberg numbers Wi « 1. Thickening coincides with the extreme elongation of a minority population of rings that grows with Wi. The large susceptibility of some rings to extend is due to a flow-driven formation of topological links that connect multiple rings into supramolecular chains. Links form spontaneously with a longer delay at lower Wi and are pulled tight and stabilized by the flow. Once linked, these composite objects experience larger drag forces than individual rings, driving their strong elongation. The fraction of linked rings depends non-monotonically on Wi, increasing to a maximum when Wi 1 before rapidly decreasing when the strain rate approaches 1/Te.
- Authors:
-
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Duke Univ., Durham, NC (United States)
- Publication Date:
- Research Org.:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA)
- OSTI Identifier:
- 1633724
- Report Number(s):
- SAND2020-5909J
Journal ID: ISSN 0031-9007; PRLTAO; 686600; TRN: US2201385
- Grant/Contract Number:
- AC04-94AL85000
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review Letters
- Additional Journal Information:
- Journal Volume: 124; Journal Issue: 2; Journal ID: ISSN 0031-9007
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE
Citation Formats
O’Connor, Thomas C., Ge, Ting, Rubinstein, Michael, and Grest, Gary S. Topological Linking Drives Anomalous Thickening of Ring Polymers in Weak Extensional Flows. United States: N. p., 2020.
Web. doi:10.1103/PhysRevLett.124.027801.
O’Connor, Thomas C., Ge, Ting, Rubinstein, Michael, & Grest, Gary S. Topological Linking Drives Anomalous Thickening of Ring Polymers in Weak Extensional Flows. United States. https://doi.org/10.1103/PhysRevLett.124.027801
O’Connor, Thomas C., Ge, Ting, Rubinstein, Michael, and Grest, Gary S. Mon .
"Topological Linking Drives Anomalous Thickening of Ring Polymers in Weak Extensional Flows". United States. https://doi.org/10.1103/PhysRevLett.124.027801. https://www.osti.gov/servlets/purl/1633724.
@article{osti_1633724,
title = {Topological Linking Drives Anomalous Thickening of Ring Polymers in Weak Extensional Flows},
author = {O’Connor, Thomas C. and Ge, Ting and Rubinstein, Michael and Grest, Gary S.},
abstractNote = {Molecular dynamics simulations confirm recent extensional flow experiments showing ring polymer melts exhibit strong extension-rate thickening of the viscosity at Weissenberg numbers Wi « 1. Thickening coincides with the extreme elongation of a minority population of rings that grows with Wi. The large susceptibility of some rings to extend is due to a flow-driven formation of topological links that connect multiple rings into supramolecular chains. Links form spontaneously with a longer delay at lower Wi and are pulled tight and stabilized by the flow. Once linked, these composite objects experience larger drag forces than individual rings, driving their strong elongation. The fraction of linked rings depends non-monotonically on Wi, increasing to a maximum when Wi 1 before rapidly decreasing when the strain rate approaches 1/Te.},
doi = {10.1103/PhysRevLett.124.027801},
journal = {Physical Review Letters},
number = 2,
volume = 124,
place = {United States},
year = {Mon Jan 13 00:00:00 EST 2020},
month = {Mon Jan 13 00:00:00 EST 2020}
}
Web of Science
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