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Small angle neutron scattering observation of chain retraction after a large step deformation

Blanchard, A., Graham, R.S., Heinrich, M., Richter, D., Pyckhout-Hintzen, W., Richter, D., Likhtman, A.E., McLeish, T.B.C, Read, D.J., Straube, E. and Kohlbrecher, J. (2005) Small angle neutron scattering observation of chain retraction after a large step deformation. Physical Review Letters, 95 (16). Art. No. 166001. ISSN 0031-9007

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Abstract

The process of retraction in entangled linear chains after a fast nonlinear stretch was detected from time-resolved but quenched small angle neutron scattering (SANS) experiments on long, well-entangled polyisoprene chains. The statically obtained SANS data cover the relevant time regime for retraction, and they provide a direct, microscopic verification of this nonlinear process as predicted by the tube model. Clear, quantitative agreement is found with recent theories of contour length fluctuations and convective constraint release, using parameters obtained mainly from linear rheology. The theory captures the full range of scattering vectors once the crossover to fluctuations on length scales below the tube diameter is accounted for.

Item Type: Article
Copyright, Publisher and Additional Information: © 2005 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 > Faculty of Maths and Physical Sciences (Leeds) > School of Mathematics (Leeds) > Applied Mathematics (Leeds)
Depositing User: Repository Officer
Date Deposited: 17 Aug 2006
Last Modified: 07 Jun 2014 23:47
Published Version: http://link.aps.org/abstract/PRL/v95/e166001
Status: Published
Publisher: American Physical Society
Refereed: Yes
Identification Number: 10.1103/PhysRevLett.95.166001
URI: http://eprints.whiterose.ac.uk/id/eprint/1510

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