Journal Article

PreJuSER-51535

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Molecular Observation of Constraint Release in Polymer Melts

Zamponi, M.FZJ* ; Wischnewski, A.FZJ* ; Monkenbusch, M.FZJ* ; Willner, L.FZJ* ; Richter, D.FZJ* ; Likhtman, A. E. ; Kali, G. ; Farago, B.

2006
APS College Park, Md.

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Please use a persistent id in citations: http://hdl.handle.net/2128/1151  doi:10.1103/PhysRevLett.96.238302

Abstract: The dynamics of binary polymer blends of few labeled long chains in successively shorter matrix chains has been investigated by neutron spin echo (NSE) spectroscopy. For the first time the effect of constraint release on the chain relaxation has been directly observed on a microscopic scale. Decreasing the matrix chain length reduces the topological confinement until unconfined Rouse motion is observed, when the matrix chains are too short to confine the long chain in a tube. Whereas an analytical description of the effect is not yet available, a new simulation based on the slip-link model shows perfect agreement with the NSE data over the full range of matrix molecular weights.

Keyword(s): J

Note: Record converted from VDB: 12.11.2012

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Contributing Institute(s):

1. Neutronenstreuung (IFF-INS)
2. Streumethoden (IFF-ISM)
3. JCNS (Jülich Centre for Neutron Science JCNS (JCNS) ; JCNS)

Research Program(s):

1. Kondensierte Materie (P54)
2. Großgeräte für die Forschung mit Photonen, Neutronen und Ionen (PNI) (P55)

Appears in the scientific report 2006
Notes: This version is available at the following Publisher URL: http://prl.aps.org

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