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The topological glass in ring polymers
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Lo, Wei-Chang and Turner, Matthew S. (2013) The topological glass in ring polymers. EPL (Europhysics Letters), Volume 102 (Number 5). Article number 58005. doi:10.1209/0295-5075/102/58005
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WRAP_Turner_0295-5075_102_5_58005.pdf - Published Version Available under License Creative Commons Attribution. Download (805Kb) | Preview |
Official URL: http://dx.doi.org/10.1209/0295-5075/102/58005
Abstract
We study the dynamics of concentrated, long, semi-flexible, unknotted and unlinked ring polymers embedded in a gel by Monte Carlo simulation of a coarse-grained model. This involves the ansatz that the rings compactify into a duplex structure where they can be modelled as linear polymers. The classical polymer glass transition involves a rapid loss of microscopic freedom within the polymer molecule as the temperature is reduced toward Tg. Here we are interested in temperatures well above Tg where the polymers retain high microscopic mobility. We analyse the slowing of stress relaxation originating from inter-ring penetrations (threadings). For long polymers an extended network of quasi-topological penetrations forms. The longest relaxation time appears to depend exponentially on the ring polymer contour length, reminiscent of the usual exponential slowing (e.g., with temperature) in classical glasses. Finally, we discuss how this represents a universality class for glassy dynamics.
| Item Type: | Journal Article | ||||
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| Subjects: | Q Science > QC Physics | ||||
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
| Library of Congress Subject Headings (LCSH): | Polymers , Monte Carlo method, Physics -- Mathematical models, Glass -- Research, Topology | ||||
| Journal or Publication Title: | EPL (Europhysics Letters) | ||||
| Publisher: | Institute of Physics Publishing Ltd. | ||||
| ISSN: | 0295-5075 | ||||
| Official Date: | 26 June 2013 | ||||
| Dates: |
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| Volume: | Volume 102 | ||||
| Number: | Number 5 | ||||
| Page Range: | Article number 58005 | ||||
| DOI: | 10.1209/0295-5075/102/58005 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Open Access | ||||
| Funder: | Engineering and Physical Sciences Research Council (EPSRC) | ||||
| Grant number: | P/E501311/1 |
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