Bulletin of the American Physical Society
APS March Meeting 2023
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session UU04: V: Advanced Polymer Phenomena
5:00 AM–6:48 AM,
Wednesday, March 22, 2023
Room: Virtual Room 4
Sponsoring
Unit:
DPOLY
Chair: Sarah (Ying) Zhong, University of South Florida
Abstract: UU04.00004 : Molecular Dynamics Simulation of Entangled Melts at High Rates: Identifying Entanglement Lockup Mechanism Leading to True Strain Hardening*
5:36 AM–5:48 AM
Presenter:
Yexin Zheng
(Univ of Akron)
Authors:
Shi-Qing Wang
(University of Akron)
Yexin Zheng
(Univ of Akron)
Mesfin Tsige
(University of Akron)
the bead-spring model to indicate how the entanglement lockup manifests in
the late stage of fast Rouse-Weissnberg number (WiR>>1) uniaxial melt
stretching of entangled polymer melts. At high strains, distinct features show
up to reveal the emergence of an increasingly tightened entanglement
network. Chain tension can build up, peaking at the middle of the chain, to a
level for chain scission, through accumulated interchain interactions, as if
there is a tug-of-war ongoing for each load-bearing chain. Thanks to the
interchain uncrossability, network junctions form by the pairing of two or
more hairpins. It is hypothesized that the interchain entanglement at
junctions can lockup through prevailing twist-like interchain couplings as long
as WiR > 9. In this limit, a significant fraction of chains act like cyclic chains to
form a network held by interchain uncrossability, and appreciable chain
tension emerges.
*This work was supported, in part, by grants from NSF (DMR-1609977 and 1905870).
Follow Us |
Engage
Become an APS Member |
My APS
Renew Membership |
Information for |
About APSThe American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics. |
© 2024 American Physical Society
| All rights reserved | Terms of Use
| Contact Us
Headquarters
1 Physics Ellipse, College Park, MD 20740-3844
(301) 209-3200
Editorial Office
100 Motor Pkwy, Suite 110, Hauppauge, NY 11788
(631) 591-4000
Office of Public Affairs
529 14th St NW, Suite 1050, Washington, D.C. 20045-2001
(202) 662-8700