Direct measurement of topological interactions in polymers under shear using neutron spin echo spectroscopy

Maciej Kawecki; Franz A. Adlmann; Philipp Gutfreund; Peter Falus; David Uhrig; Sudipta Gupta; Bela Farago; Piotr Zolnierczuk; Malcom Cochran; Max Wolff

doi:10.1038/s41598-019-39437-2

Direct measurement of topological interactions in polymers under shear using neutron spin echo spectroscopy

Maciej Kawecki, Franz A. Adlmann, Philipp Gutfreund, Peter Falus, David Uhrig, Sudipta Gupta, Bela Farago, Piotr Zolnierczuk, Malcom Cochran, Max Wolff

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

We present in-situ neutron spin echo measurements on an entangled polydimethylsiloxane melt under shear and demonstrate the ability to monitor nano-scale dynamics in flowing liquids. We report no changes in the topological interactions of the chains for shear rates approaching the inverse longest relaxation time. Further experiments following along this line will allow to systematically test the predictions of theories, like e.g. convective constraint release.

Original language	English
Article number	2823
Journal	Scientific Reports
Volume	9
Issue number	1
DOIs	https://doi.org/10.1038/s41598-019-39437-2
State	Published - Dec 1 2019
Externally published	Yes

Funding

The authors acknowledge financial support from the Swedish research council under contract number: 2016-04645 as well as STINT (contract No. IG-2011-2067). The polymer synthesis at the Center for Nanophase Materials Sciences at ORNL, USA, (Proposal CNMS2015-R64) and beam time allocations at the Institut Laue-Langevin, France, (https://doi.org/10.5291/ILL-DATA.9-11-1738) and the Spallation Neutron Source, USA, (IPTS 13781) are acknowledged. The authors thank Airidas Korolkovas for fruitful discussions.

Funders	Funder number
Swedish Foundation for International Cooperation in Research and Higher Education	IG-2011-2067
Vetenskapsrådet	2016-04645

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10.1038/s41598-019-39437-2

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AU - Gupta, Sudipta

AU - Farago, Bela

AU - Zolnierczuk, Piotr

AU - Cochran, Malcom

AU - Wolff, Max

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Direct measurement of topological interactions in polymers under shear using neutron spin echo spectroscopy

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