Chain Segment Order in Polymer Thin Films on a Nonadsorbing Surface: A NMR Study

Autor:	P. Auroy, S. Rivillon, B. Deloche
Rok vydání:	2000
Předmět:	Deuterium NMR Surface (mathematics) Range (particle radiation) chemistry.chemical_compound Materials science Planar Chain (algebraic topology) Polydimethylsiloxane chemistry Chemical physics Diffusion General Physics and Astronomy Polymer thin films
Zdroj:	Physical Review Letters. 84:499-502
ISSN:	1079-7114 0031-9007
DOI:	10.1103/physrevlett.84.499
Popis:	The dynamics of polydimethylsiloxane chains confined between air and a solid, wettable, and nonadsorbing surface is investigated using deuterium NMR. Chain segments in such molten films undergo uniaxial reorientations around the normal to the surfaces. The influence of the film thickness proves this dynamic uniaxiality involves rapid segment diffusion between both surfaces which impose a high degree of planar orientation. This segmental ordering is observed over a thickness range which depends on the degree of chain entanglements.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::05ec11c46e3ef9c8cc7097f92105814a https://doi.org/10.1103/physrevlett.84.499 Zobrazit plný text záznamu