Wischnewski, A., Monkenbusch, M., Willner, L., Richter, D., Likhtman, A.E., McLeish, T.C.B. and Farago, B. (2002) Molecular observation of contour-length fluctuations limiting topological confinement in polymer melts. Physical Review Letters, 88 (5). Art. No. 058301. ISSN 0031-9007
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Abstract
In order to study the mechanisms limiting the topological chain confinement in polymer melts, we have performed neutron-spin-echo investigations of the single-chain dynamic-structure factor from polyethylene melts over a large range of chain lengths. While at high molecular weight the reptation model is corroborated, a systematic loosening of the confinement with decreasing chain length is found. The dynamic-structure factors are quantitatively described by the effect of contour-length fluctuations on the confining tube, establishing this mechanism on a molecular level in space and time.
| Item Type: | Article |
|---|---|
| Copyright, Publisher and Additional Information: | © 2002 The American Physical Society. Reproduced in accordance with the publisher's self-archiving policy. |
| Academic Units: | The University of Leeds > Faculty of Maths and Physical Sciences (Leeds) > School of Physics and Astronomy (Leeds) The University of Leeds > University of Leeds Research Centres and Institutes > Interdisciplinary Research Centre in Polymer Science and Technology (Leeds) |
| Depositing User: | Repository Officer |
| Date Deposited: | 17 Aug 2006 |
| Last Modified: | 08 Feb 2013 17:02 |
| Published Version: | http://link.aps.org/abstract/PRL/v88/e058301 |
| Status: | Published |
| Publisher: | American Physical Society |
| Refereed: | Yes |
| Identification Number: | 10.1103/PhysRevLett.88.058301 |
| URI: | http://eprints.whiterose.ac.uk/id/eprint/1507 |
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