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Sensing Polymer Chain Dynamics through Ring Topology: A Neutron Spin Echo Study.

Gooßen, Sebastian; Krutyeva, Margarita; Sharp, Melissa LU ; Feoktystov, Artem; Allgaier, Jürgen; Pyckhout-Hintzen, Wim; Wischnewski, Andreas and Richter, Dieter (2015) In Physical Review Letters 115(14).
Abstract
Using neutron spin echo spectroscopy, we show that the segmental dynamics of polymer rings immersed in linear chains is completely controlled by the host. This transforms rings into ideal probes for studying the entanglement dynamics of the embedding matrix. As a consequence of the unique ring topology, in long chain matrices the entanglement spacing is directly revealed, unaffected by local reptation of the host molecules beyond this distance. In shorter entangled matrices, where in the time frame of the experiment secondary effects such as contour length fluctuations or constraint release could play a role, the ring motion reveals that the contour length fluctuation is weaker than assumed in state-of-the-art rheology and that the... (More)
Using neutron spin echo spectroscopy, we show that the segmental dynamics of polymer rings immersed in linear chains is completely controlled by the host. This transforms rings into ideal probes for studying the entanglement dynamics of the embedding matrix. As a consequence of the unique ring topology, in long chain matrices the entanglement spacing is directly revealed, unaffected by local reptation of the host molecules beyond this distance. In shorter entangled matrices, where in the time frame of the experiment secondary effects such as contour length fluctuations or constraint release could play a role, the ring motion reveals that the contour length fluctuation is weaker than assumed in state-of-the-art rheology and that the constraint release is negligible. We expect that rings, as topological probes, will also grant direct access to molecular aspects of polymer motion which have been inaccessible until now within chains adhering to more complex architectures. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review Letters
volume
115
issue
14
publisher
American Physical Society
external identifiers
  • pmid:26551826
  • wos:000361815100010
  • scopus:84944088634
ISSN
1079-7114
DOI
10.1103/PhysRevLett.115.148302
language
English
LU publication?
yes
id
b1f4b4ba-47db-4922-8856-e484be6cf60e (old id 8236255)
date added to LUP
2015-12-02 09:10:27
date last changed
2017-11-19 03:00:33
@article{b1f4b4ba-47db-4922-8856-e484be6cf60e,
  abstract     = {Using neutron spin echo spectroscopy, we show that the segmental dynamics of polymer rings immersed in linear chains is completely controlled by the host. This transforms rings into ideal probes for studying the entanglement dynamics of the embedding matrix. As a consequence of the unique ring topology, in long chain matrices the entanglement spacing is directly revealed, unaffected by local reptation of the host molecules beyond this distance. In shorter entangled matrices, where in the time frame of the experiment secondary effects such as contour length fluctuations or constraint release could play a role, the ring motion reveals that the contour length fluctuation is weaker than assumed in state-of-the-art rheology and that the constraint release is negligible. We expect that rings, as topological probes, will also grant direct access to molecular aspects of polymer motion which have been inaccessible until now within chains adhering to more complex architectures.},
  articleno    = {148302},
  author       = {Gooßen, Sebastian and Krutyeva, Margarita and Sharp, Melissa and Feoktystov, Artem and Allgaier, Jürgen and Pyckhout-Hintzen, Wim and Wischnewski, Andreas and Richter, Dieter},
  issn         = {1079-7114},
  language     = {eng},
  number       = {14},
  publisher    = {American Physical Society},
  series       = {Physical Review Letters},
  title        = {Sensing Polymer Chain Dynamics through Ring Topology: A Neutron Spin Echo Study.},
  url          = {http://dx.doi.org/10.1103/PhysRevLett.115.148302},
  volume       = {115},
  year         = {2015},
}