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Communication: Polymer entanglement dynamics: Role of attractive interactions

Journal Article · · Journal of Chemical Physics
DOI:https://doi.org/10.1063/1.4964617· OSTI ID:1343059
The coupled dynamics of entangled polymers, which span broad time and length scales, govern their unique viscoelastic properties. To follow chain mobility by numerical simulations from the intermediate Rouse and reptation regimes to the late time diffusive regime, highly coarse grained models with purely repulsive interactions between monomers are widely used since they are computationally the most efficient. In this paper, using large scale molecular dynamics simulations, the effect of including the attractive interaction between monomers on the dynamics of entangled polymer melts is explored for the first time over a wide temperature range. Attractive interactions have little effect on the local packing for all temperatures T and on the chain mobility for T higher than about twice the glass transition Tg. Finally, these results, across a broad range of molecular weight, show that to study the dynamics of entangled polymer melts, the interactions can be treated as pure repulsive, confirming a posteriori the validity of previous studies and opening the way to new large scale numerical simulations.
Research Organization:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE; USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
AC04-94AL85000
OSTI ID:
1343059
Alternate ID(s):
OSTI ID: 1328534
Report Number(s):
SAND2016--9156J; 647440
Journal Information:
Journal of Chemical Physics, Journal Name: Journal of Chemical Physics Journal Issue: 14 Vol. 145; ISSN 0021-9606
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (12)

Nanoparticle Motion in Entangled Melts of Linear and Nonconcatenated Ring Polymers text January 2017
5D Entanglement in Star Polymer Dynamics journal September 2018
Deconstructing Oligomer Distributions: Discrete Species and Artificial Distributions journal July 2019
Deconstructing Oligomer Distributions: Discrete Species and Artificial Distributions journal September 2019
Study of the conformation of polyelectrolyte aggregates using coarse-grained molecular dynamics simulations journal January 2017
Self-assembly of polyelectrolyte diblock copolymers at monovalent and multivalent counterions journal January 2019
Note: Determine entanglement length through monomer mean-square displacement journal January 2017
A coarse-grained polymer model for studying the glass transition journal March 2019
Molecular modeling of polycarbonate materials: Glass transition and mechanical properties journal September 2017
Modeling of Entangled Polymer Diffusion in Melts and Nanocomposites: A Review journal May 2019
Modeling of Entangled Polymer Diffusion in Melts and Nanocomposites: A Review text January 2019
A coarse-grained polymer model for studying the glass transition text January 2018

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