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https://idr.nitk.ac.in/jspui/handle/123456789/12177
Title: | Nanoparticle Motion in Entangled Melts of Linear and Nonconcatenated Ring Polymers |
Authors: | Ge, T. Kalathi, J.T. Halverson, J.D. Grest, G.S. Rubinstein, M. |
Issue Date: | 2017 |
Citation: | Macromolecules, 2017, Vol.50, 4, pp.1749-1754 |
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 d larger than the entanglement spacing a is observed in a melt of linear polymers before the onset of Fickian NP diffusion. This strong suppression of NP motion occurs progressively as d exceeds a 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 d > a in ring polymers is not as strongly suppressed prior to Fickian diffusion. The diffusion coefficient D decreases with increasing d 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. 2017 American Chemical Society. |
URI: | http://idr.nitk.ac.in/jspui/handle/123456789/12177 |
Appears in Collections: | 1. Journal Articles |
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