Dresden 2003 – wissenschaftliches Programm
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CPP: Chemische Physik und Polymerphysik
CPP 20: POSTER A
CPP 20.23: Poster
Montag, 24. März 2003, 19:00–21:00, ZEU/250
Imaging the nanostructure evolution of oriented polyethylene during melting — •Norbert Stribeck1, Rüdiger Bayer2, Gebhardt von Krosigk3, and Rainer Gehrke4 — 1Institute of Technical and Macromolecular Chemistry, University of Hamburg, Hamburg, Germany — 2Institut f. Werkstofftechnik, Universität GH Kassel, Kassel, Germany — 3FB Physik, Universität Rostock, Rostock, Germany — 4HASYLAB at DESY, Hamburg, Germany
High-pressure injection-molded polyethylene (PE) rods are studied by ultra small-angle X-ray scattering during the heating of the polymer[1]. Injection of a cool melt into a cold mold yields highly oriented PE rods with a core–shell structure. Samples from both the core and the shell zone are studied. The 2D scattering patterns are evaluated using the multi-dimensional chord distribution function analysis[2]. From the obvious evolution of the nanostructure during successive crystallite melting, the sequence of processes occuring during crystallization is elucidated.
[1] Stribeck N, Bayer R, v Krosigk G, Gehrke R (2002) Polymer, 43(13):3779-3784
[2] Stribeck N (2001) J Appl Cryst, 34(4):496-503