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Disentangling of complex polymer dynamics under soft nanoscopic confinement

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Abstract

We discuss the complex interplay between host and guest dynamics for a polymer in soft confinement by a droplet-phase microemulsion. Intermediate scattering functions obtained by neutron spin echo spectroscopy are first analysed by means of an effective diffusion coefficient. From its dependence on the absolute of the scattering vector q we concluded a sophisticated model for the systems dynamics taking both polymer and microemulsion contributions into account. Global fitting of this model to the intermediate scattering functions at all measured q-values and all investigated confinement sizes eventually allows for a precise disentangling of the pure polymer dynamics in confinement from the overlaying microemulsion dynamics. Validity of our approach is further supported by numerical random walk calculations.

Graphical abstract: Disentangling of complex polymer dynamics under soft nanoscopic confinement

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Article information


Submitted
07 Jun 2020
Accepted
21 Sep 2020
First published
22 Sep 2020

Soft Matter, 2020, Advance Article
Article type
Paper

Disentangling of complex polymer dynamics under soft nanoscopic confinement

B. Kuttich, I. Hoffmann and B. Stühn, Soft Matter, 2020, Advance Article , DOI: 10.1039/D0SM01058H

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