Journal Article

PreJuSER-19070

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Unified Description of the Viscoelastic and Dielectric Global Chain Motion in Terms of the Tube Theory

Glomann, T.FZJ* ; Schneider, G. J.FZJ* ; Bras, A. R.FZJ* ; Pyckhout-Hintzen, W.FZJ* ; Wischnewski, A.FZJ* ; Zorn, R.FZJ* ; Allgaier, J.FZJ* ; Richter, D.FZJ*

2011
Soc. Washington, DC

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Please use a persistent id in citations: doi:10.1021/ma200674z

Abstract: We present a new approach to a unified description of the dielectric end-to-end vector and the viscoelastic stress relaxation of entangled homopolymer melts in terms of the tube model. The comparison and quantitative analysis of carefully recorded viscoelastic and dielectric relaxation spectra evidence that the dielectric mode distribution is completely determined by reptation and contour length fluctuations and thus is insensitive to the CR process within experimental accuracy. We show that a joint analysis of viscoelastic and dielectric experiments allows an accurate characterization of pure single chain dynamics. The general validity of our approach is demonstrated on monodisperse polyisoprene (PI) for a wide range of different molecular weights and on poly(butylene oxide) (PBO).

Keyword(s): Basic research (1st) ; Others (1st) ; Soft Condensed Matter (2nd) ; J

Note: The authors thank Dr. Lutz Willner for the synthesis of some of the polyisoprene samples. We gratefully acknowledge the funding by the Deutsche Kautschuk Gesellschaft, Frankfurt, Germany.

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Contributing Institute(s):

1. Neutronenstreuung (ICS-1)
2. JCNS-FRM-II (JCNS (München) ; Jülich Centre for Neutron Science JCNS (München) ; JCNS-FRM-II)
3. Neutronenstreuung (JCNS-1)

Research Program(s):

1. BioSoft: Makromolekulare Systeme und biologische Informationsverarbeitung (P45)
2. Großgeräte für die Forschung mit Photonen, Neutronen und Ionen (PNI) (P55)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2011

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