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CPP: Chemische Physik und Polymerphysik

CPP 20: POSTER A

CPP 20.22: Poster

Monday, March 24, 2003, 19:00–21:00, ZEU/250

Nanostructure evolution of injection moulded UHMWPE during heating — •Norbert Stribeck¹, Benjamin S. Hsiao², Zhi-Gang Wang², and Rainer Gehrke³ — ¹Institute of Technical and Macromolecular Chemistry, University of Hamburg, Hamburg, Germany — ²State University New York at Stony Brook, New York, USA — ³HASYLAB at DESY, Hamburg, Germany

Ultrahigh molecular weight polyethylene (UHMWPE) is injection moulded under high pressure and studied by ultra-small-angle X-ray scattering (USAXS) during melting in a time-resolved synchrotron radiation experiment[1]. Results concerning melting and recrystallization of crystalline lamellae are compared to data obtained by differential scanning calorimetry. USAXS analysis[2,3] reveals a coupled process of melting and crystallization that is not accompanied by external heat flow.

[1] Wang Z, Hsiao, BS, Stribeck N, Gehrke R (2002) Macromolecules, 35(6):2200-2206

[2] Stribeck N (2001) J Appl Cryst, 34(4):496-503

[3] Stribeck N (2002) Coll Polym Sci 280(3):254-259