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Title: Scaling Behavior of Anisotropy Relaxation in Deformed Polymers

Abstract

Drawing an analogy to the paradigm of quasielastic neutron scattering, we present a general approach for quantitatively investigating the spatiotemporal dependence of structural anisotropy relaxation in deformed polymers by using small-angle neutron scattering. Experiments and nonequilibrium molecular dynamics simulations on polymer melts over a wide range of molecular weights reveal that their conformational relaxation at relatively high momentum transfer Q and short time can be described by a simple scaling law, with the relaxation rate proportional to Q. Furthermore, this peculiar scaling behavior, which cannot be derived from the classical Rouse and tube models, is indicative of a surprisingly weak direct influence of entanglement on the microscopic mechanism of single-chain anisotropy relaxation.

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1];  [3];  [4]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Tsinghua Univ., Beijing (China)
  3. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States); Univ. of Delaware, Newark, DE (United States)
  4. Institut Laue-Langevin, Grenoble Cedex (France)
Publication Date:
Research Org.:
Oak Ridge National Laboratory, Oak Ridge Leadership Computing Facility (OLCF); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1479772
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Journal Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 121; Journal Issue: 11; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING

Citation Formats

Lam, Christopher N., Xu, Wen -Sheng, Chen, Wei -Ren, Wang, Zhe, Stanley, Christopher B., Carrillo, Jan-Michael Y., Uhrig, David, Wang, Weiyu, Hong, Kunlun, Liu, Yun, Porcar, Lionel, Do, Changwoo, Smith, Gregory Scott, Sumpter, Bobby G., and Wang, Yangyang. Scaling Behavior of Anisotropy Relaxation in Deformed Polymers. United States: N. p., 2018. Web. doi:10.1103/PhysRevLett.121.117801.
Lam, Christopher N., Xu, Wen -Sheng, Chen, Wei -Ren, Wang, Zhe, Stanley, Christopher B., Carrillo, Jan-Michael Y., Uhrig, David, Wang, Weiyu, Hong, Kunlun, Liu, Yun, Porcar, Lionel, Do, Changwoo, Smith, Gregory Scott, Sumpter, Bobby G., & Wang, Yangyang. Scaling Behavior of Anisotropy Relaxation in Deformed Polymers. United States. doi:10.1103/PhysRevLett.121.117801.
Lam, Christopher N., Xu, Wen -Sheng, Chen, Wei -Ren, Wang, Zhe, Stanley, Christopher B., Carrillo, Jan-Michael Y., Uhrig, David, Wang, Weiyu, Hong, Kunlun, Liu, Yun, Porcar, Lionel, Do, Changwoo, Smith, Gregory Scott, Sumpter, Bobby G., and Wang, Yangyang. Tue . "Scaling Behavior of Anisotropy Relaxation in Deformed Polymers". United States. doi:10.1103/PhysRevLett.121.117801.
@article{osti_1479772,
title = {Scaling Behavior of Anisotropy Relaxation in Deformed Polymers},
author = {Lam, Christopher N. and Xu, Wen -Sheng and Chen, Wei -Ren and Wang, Zhe and Stanley, Christopher B. and Carrillo, Jan-Michael Y. and Uhrig, David and Wang, Weiyu and Hong, Kunlun and Liu, Yun and Porcar, Lionel and Do, Changwoo and Smith, Gregory Scott and Sumpter, Bobby G. and Wang, Yangyang},
abstractNote = {Drawing an analogy to the paradigm of quasielastic neutron scattering, we present a general approach for quantitatively investigating the spatiotemporal dependence of structural anisotropy relaxation in deformed polymers by using small-angle neutron scattering. Experiments and nonequilibrium molecular dynamics simulations on polymer melts over a wide range of molecular weights reveal that their conformational relaxation at relatively high momentum transfer Q and short time can be described by a simple scaling law, with the relaxation rate proportional to Q. Furthermore, this peculiar scaling behavior, which cannot be derived from the classical Rouse and tube models, is indicative of a surprisingly weak direct influence of entanglement on the microscopic mechanism of single-chain anisotropy relaxation.},
doi = {10.1103/PhysRevLett.121.117801},
journal = {Physical Review Letters},
issn = {0031-9007},
number = 11,
volume = 121,
place = {United States},
year = {2018},
month = {9}
}

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