Physical Review Letters 2013-03-08

Effect of nanoconfinement on polymer dynamics: surface layers and interphases.

M Krutyeva, A Wischnewski, M Monkenbusch, L Willner, J Maiz, C Mijangos, A Arbe, J Colmenero, A Radulescu, O Holderer, M Ohl, D Richter

文献索引：PLoS ONE 9(7) , e103118, (2014)

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摘要

We present neutron spin echo experiments that address the much debated topic of dynamic phenomena in polymer melts that are induced by interacting with a confining surface. We find an anchored surface layer that internally is highly mobile and not glassy as heavily promoted in the literature. The polymer dynamics in confinement is, rather, determined by two phases, one fully equal to the bulk polymer and another that is partly anchored at the surface. By strong topological interaction, this phase confines further chains with no direct contact to the surface. These form the often invoked interphase, where the full chain relaxation is impeded through the interaction with the anchored chains.

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