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
Available under licence : See the attached licence file.
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.
|Copyright, Publisher and Additional Information:||© 2002 The American Physical Society. Reproduced in accordance with the publisher's self-archiving policy.|
|Institution:||The University of Leeds|
|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:||06 Jun 2014 09:24|
|Publisher:||American Physical Society|