Nanoparticle Motion in Entangled Melts of Linear and Nonconcatenated Ring Polymers

Overview

Journal Macromolecules

Date 2017 Apr 11

PMID 28392603

Citations 8

Authors

Ting Ge

Jagannathan T Kalathi

Jonathan D Halverson

Gary S Grest

Michael Rubinstein

Affiliations

Soon will be listed here.

Abstract

The motion of nanoparticles (NPs) in entangled melts of linear polymers and nonconcatenated ring polymers are compared by large-scale molecular dynamics simulations. The comparison provides a paradigm for the effects of polymer architecture on the dynamical coupling between NPs and polymers in nanocomposites. Strongly suppressed motion of NPs with diameter larger than the entanglement spacing is observed in a melt of linear polymers before the onset of Fickian NP diffusion. This strong suppression of NP motion occurs progressively as exceeds and is related to the hopping diffusion of NPs in the entanglement network. In contrast to the NP motion in linear polymers, the motion of NPs with > in ring polymers is not as strongly suppressed prior to Fickian diffusion. The diffusion coefficient decreases with increasing much slower in entangled rings than in entangled linear chains. NP motion in entangled nonconcatenated ring polymers is understood through a scaling analysis of the coupling between NP motion and the self-similar entangled dynamics of ring polymers.

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