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Title: Comment on “Relating Chain Conformations to Extensional Stress in Entangled Polymer Melts”

Abstract

Based on nonequilibrium molecular dynamics simulations of entangled polymer melts, a recent Letter [1] claims that the rising extensional stress is quantitatively consistent with the decreasing entropy of chains at the equilibrium entanglement length. We point out that quite the opposite is true: the intrachain entropic stress arising from individual entanglement strands agrees with the total “macroscopic” stress under only very limited conditions.

Authors:
 [1];  [1];  [2];  [2];  [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Science (CNMS)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Science (CNMS) and Computational Sciences and Engineering Div.
Publication Date:
Research Org.:
UT-Battelle LLC/ORNL, Oak Ridge, TN (Unted States); Oak Ridge National Laboratory, Oak Ridge Leadership Computing Facility (OLCF)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1567497
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Journal Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 122; Journal Issue: 5; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
Physics

Citation Formats

Xu, Wen-Sheng, Lam, Christopher N., Carrillo, Jan-Michael Y., Sumpter, Bobby G., and Wang, Yangyang. Comment on “Relating Chain Conformations to Extensional Stress in Entangled Polymer Melts”. United States: N. p., 2019. Web. doi:10.1103/PhysRevLett.122.059803.
Xu, Wen-Sheng, Lam, Christopher N., Carrillo, Jan-Michael Y., Sumpter, Bobby G., & Wang, Yangyang. Comment on “Relating Chain Conformations to Extensional Stress in Entangled Polymer Melts”. United States. doi:10.1103/PhysRevLett.122.059803.
Xu, Wen-Sheng, Lam, Christopher N., Carrillo, Jan-Michael Y., Sumpter, Bobby G., and Wang, Yangyang. Fri . "Comment on “Relating Chain Conformations to Extensional Stress in Entangled Polymer Melts”". United States. doi:10.1103/PhysRevLett.122.059803.
@article{osti_1567497,
title = {Comment on “Relating Chain Conformations to Extensional Stress in Entangled Polymer Melts”},
author = {Xu, Wen-Sheng and Lam, Christopher N. and Carrillo, Jan-Michael Y. and Sumpter, Bobby G. and Wang, Yangyang},
abstractNote = {Based on nonequilibrium molecular dynamics simulations of entangled polymer melts, a recent Letter [1] claims that the rising extensional stress is quantitatively consistent with the decreasing entropy of chains at the equilibrium entanglement length. We point out that quite the opposite is true: the intrachain entropic stress arising from individual entanglement strands agrees with the total “macroscopic” stress under only very limited conditions.},
doi = {10.1103/PhysRevLett.122.059803},
journal = {Physical Review Letters},
issn = {0031-9007},
number = 5,
volume = 122,
place = {United States},
year = {2019},
month = {2}
}

Works referenced in this record:

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