Journal Article

PreJuSER-28406

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Direct observation of the transition from free to constrained single-segment motion in entangled polymer melts

Wischnewski, A.FZJ* ; Monkenbusch, M.FZJ* ; Willner, L.FZJ* ; Richter, D.FZJ* ; Kali, G.FZJ*

2003
APS College Park, Md.

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Please use a persistent id in citations: http://hdl.handle.net/2128/1280  doi:10.1103/PhysRevLett.90.058302

Abstract: We report a direct determination of the time dependent mean-squared segment displacement of a polymer chain in the melt covering the transition from free to constraint Rouse relaxation along the virtual tube of the reptation model. This has been achieved by a neutron spin-echo (NSE) measurement of the segmental self-correlation function as conveyed by the spin-incoherent scattering from two fully protonated polymer melts, polyethylene and polyethylene propylene. Within the scenario of de Gennes reptation model a transition of the time dependence of segmental mean-squared displacements from proportional tot(1/2) to proportional tot(1/4) is expected and clearly corroborated by the incoherent NSE results.

Keyword(s): J

Note: Record converted from VDB: 12.11.2012

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Contributing Institute(s):

1. Neutronenstreuung (IFF-NST)

Research Program(s):

1. Kondensierte Materie (M02)

Appears in the scientific report 2003
Notes: This version is available at the following Publisher URL: http://prl.aps.org

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