caa a22 4500 463234537 CHVBK 20180405153252.0 cr unu---uuuuu 170326e20070801xx s 000 0 eng 10.1007/s10853-006-1106-4 doi (NATIONALLICENCE)springer-10.1007/s10853-006-1106-4 Melting and crystallization of UHMWPE skived film [Elektronische Daten] [Armando Almendarez Camarillo, Stephan Roth, Peter Bösecke, Stefan Buchner, Klaus Krenn, Rainer Gehrke, Norbert Stribeck] Commercial skived film from ultra-high molecular-weight polyethylene (UHMWPE) with considerable uniaxial orientation of lamellae is studied by ultra-small-angle X-ray scattering (USAXS) and wide-angle X-ray scattering (WAXS) during melting and crystallization in order to identify its mechanisms of crystallization. For the analysis of the nanostructure two-dimensional USAXS patterns are analyzed by means of the multidimensional chord distribution function (CDF) method. WAXS shows that crystallization is always isotropic and fast. WAXS reflections are observed before—under certain processing conditions—the SAXS pattern becomes anisotropic. Thus crystallization is decoupled from a slower process of oriented nanostructure formation (nanoforming). If nanoforming is performed isothermally at 105°C, the evolving nanodomain layers obtain some preferential orientation, as long as the orientation of the melt has not previously been erased by melt-annealing at temperatures of 140°C or above. Crystallization at temperatures ≥110°C followed by quenching leads to isotropic nanostructure. Although crystallization is always observed early in the WAXS patterns, the USAXS patterns exhibit only weak discrete scattering during isothermal treatment at temperatures of 110°C and higher. At 105°C anisotropic isothermal nanoforming starts after 1.5min. The melting of the original material resembles an inverted random car-parking mechanism. Only next-neighbor correlations are observed among the crystalline layers. The average nanodomain layer thickness is only slightly increasing (26-30nm), whereas the long period increase is strong (from 60nm to 140nm). Springer Science+Business Media, LLC, 2007 Almendarez Camarillo Armando Institute of Technical and Macromolecular Chemistry, University of Hamburg, Bundesstr. 45, 20146, Hamburg, Germany aut Roth Stephan HASYLAB at DESY, Notkestr. 85, 22603, Hamburg, Germany aut Bösecke Peter ESRF, 6 rue Jules Horowitz, B.P. 220, 38043, Grenoble Cedex 9, France aut Buchner Stefan Polymer Consult GmbH, Dorfgrund 6, 22397, Hamburg, Germany aut Krenn Klaus Isosport GmbH, Industriestr. 2-8, 7000, Eisenstadt, Austria aut Gehrke Rainer HASYLAB at DESY, Notkestr. 85, 22603, Hamburg, Germany aut Stribeck Norbert Institute of Technical and Macromolecular Chemistry, University of Hamburg, Bundesstr. 45, 20146, Hamburg, Germany aut Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/15(2007-08-01), 6212-6221 0022-2461 42:15<6212 2007 42 10853 https://doi.org/10.1007/s10853-006-1106-4 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-006-1106-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Almendarez Camarillo Armando Institute of Technical and Macromolecular Chemistry, University of Hamburg, Bundesstr. 45, 20146, Hamburg, Germany aut NATIONALLICENCE 700 1- Roth Stephan HASYLAB at DESY, Notkestr. 85, 22603, Hamburg, Germany aut NATIONALLICENCE 700 1- Bösecke Peter ESRF, 6 rue Jules Horowitz, B.P. 220, 38043, Grenoble Cedex 9, France aut NATIONALLICENCE 700 1- Buchner Stefan Polymer Consult GmbH, Dorfgrund 6, 22397, Hamburg, Germany aut NATIONALLICENCE 700 1- Krenn Klaus Isosport GmbH, Industriestr. 2-8, 7000, Eisenstadt, Austria aut NATIONALLICENCE 700 1- Gehrke Rainer HASYLAB at DESY, Notkestr. 85, 22603, Hamburg, Germany aut NATIONALLICENCE 700 1- Stribeck Norbert Institute of Technical and Macromolecular Chemistry, University of Hamburg, Bundesstr. 45, 20146, Hamburg, Germany aut NATIONALLICENCE 773 0- Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/15(2007-08-01), 6212-6221 0022-2461 42:15<6212 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer