Volume 72, Number 6, December 2005
|Page(s)||1039 - 1044|
|Section||Interdisciplinary physics and related areas of science and technology|
|Published online||18 November 2005|
Contour length fluctuations in polymer melts: A direct molecular proof
Institut für Festkörperforschung, Forschungszentrum Jülich - 52425 Jülich, Germany
2 Institut Laue-Langevin - B.P. 156X, Avenue des Martyrs 38042 Grenoble Cedex 9, France
Corresponding author: email@example.com
Accepted: 20 October 2005
In entangled polymer melts, contour length fluctuations are supposed to lift the chain confinement starting from the chain ends. Using neutron spin echo spectroscopy on polyethylene chains of intermediate length, where only the center part is labeled, allows us to separate the contribution of contour length fluctuations to the dynamic structure factor and thereby explicitly prove the effect on a molecular level. While a corresponding fully labeled chain shows the relaxation by contour length fluctuations additional to the primary relaxation, the data of the center-labeled chain, where the visibility of the fluctuations is switched off, is in excellent agreement with results for a nearly infinite long chain, where contour length fluctuations are known to be negligible.
PACS: 83.80.Sg – Polymer melts / 61.12.Ex – Neutron scattering (including small-angle scattering)
© EDP Sciences, 2005
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.