Dolata, B.
(2024),
Entanglement kinetics in polymer melts are chemically specific, ACS Macro Letters, [online], https://doi.org/10.1021/acsmacrolett.4c00092, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=956342
(Accessed October 13, 2025)
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Entanglement kinetics in polymer melts are chemically specific
Published
Author(s)
Abstract
We investigate the universality of entanglement kinetics in polymer melts. We compare predictions of a recently developed constitutive equation for disentanglement to molecular dynamics simulations of both united-atom polyethylene and Kremer-Grest models for polymers in shear and extensional flow. We confirm that entanglements recover on the retraction timescale, rather than the reptation timescale. We find that the convective constraint release parameter $\beta$ is independent of molecular weight, but that it increases with the ratio of Kuhn length $b_K$ to packing length $p$ as $\beta\sim (b_K/p)^\alpha$, with an exponent $\alpha=1.9$, which may suggest that disentanglement rate correlates with an increase in the tube diameter. These results may help shed light on which polymers are more likely to undergo shear banding.Citation
ACS Macro Letters
Volume
13
Pub Type
Journals
Download Paper
Citation
Issues
If you have any questions about this publication or are having problems accessing it, please contact [email protected].
Created July 3, 2024, Updated July 9, 2024