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Confinement effect of chain dynamics in micrometer thick layers of a polymer melt below the critical molecular weight

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dc.contributor.author Kausik R.
dc.contributor.author Mattea C.
dc.contributor.author Fatkullin N.
dc.contributor.author Kimmich R.
dc.date.accessioned 2018-09-18T20:04:49Z
dc.date.available 2018-09-18T20:04:49Z
dc.date.issued 2006
dc.identifier.issn 0021-9606
dc.identifier.uri https://dspace.kpfu.ru/xmlui/handle/net/136306
dc.description.abstract Polymer melts confined in micrometer thick layers were examined with the aid of field-cycling NMR relaxometry. It is shown that chain dynamics under such moderate confinement conditions are perceptibly different from those observed in the bulk material. This is considered to be a consequence of the corset effect, which predicts a crossover between Rouse and reptationlike dynamics for molecular weights below the critical value at confinement length scales much larger than 10RF, where RF is the Flory radius of the bulk polymer coil [Fatkullin et al., New J. Phys. 6, 46 (2004)]. For the polymer species studied, a perfluoropolyether with a molecular weight of 11 000, the Flory radius is of the order 10 nm, so that the experiment refers to the far end of the predicted crossover region from confined to bulk chain dynamics. Remarkably the confinement effect is shown to reach polymer-wall distances of the order 100 Flory radii. © 2005 American Institute of Physics.
dc.relation.ispartofseries Journal of Chemical Physics
dc.title Confinement effect of chain dynamics in micrometer thick layers of a polymer melt below the critical molecular weight
dc.type Article
dc.relation.ispartofseries-issue 11
dc.relation.ispartofseries-volume 124
dc.collection Публикации сотрудников КФУ
dc.source.id SCOPUS00219606-2006-124-11-SID34547139316


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  • Публикации сотрудников КФУ Scopus [24551]
    Коллекция содержит публикации сотрудников Казанского федерального (до 2010 года Казанского государственного) университета, проиндексированные в БД Scopus, начиная с 1970г.

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