Journal Article

PreJuSER-1874

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Intermediate length scale dynamics of polyisobutylene

Farago, B. ; Arbe, A. ; Colmenero, J. ; Faust, R. ; Buchenau, U.FZJ* ; Richter, D.FZJ*

2002
APS College Park, Md.

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Please use a persistent id in citations: http://hdl.handle.net/2128/1256  doi:10.1103/PhysRevE.65.051803

Abstract: We report on a neutron spin echo investigation of the intermediate scale dynamics of polyisobutylene studying both the self-motion and the collective motion. The momentum transfer (Q) dependences of the self-correlation times are found to follow a Q(-2/beta) law in agreement with the picture of Gaussian dynamics. In the full Q range of observation, their temperature dependence is weaker than the rheological shift factor. The same is true for the stress relaxation time as seen in sound wave absorption. The collective times show both temperature dependences; at the structure factor peak, they follow the temperature dependence of the viscosity, but below the peak, one finds the stress relaxation behavior.

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 2002
Notes: This version is available at the following Publisher URL: http://pre.aps.org

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