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

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 re...

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Detalles Bibliográficos
Autores principales: Kawecki, Maciej, A. Adlmann, Franz, Gutfreund, Philipp, Falus, Peter, Uhrig, David, Gupta, Sudipta, Farago, Bela, Zolnierczuk, Piotr, Cochran, Malcom, Wolff, Max
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2019
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6391414/
https://www.ncbi.nlm.nih.gov/pubmed/30808946
http://dx.doi.org/10.1038/s41598-019-39437-2
Descripción
Sumario: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.

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