TIT# Advanced X-Ray scattering methods for the study of structure and
     its evolution in soft materials with fiber symmetry
AUT# Stribeck, Norbert;
SOU# J. Phys.: Conf. Ser. (2010), submitted, 000000-(11pp)
LOC# xv126
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ABS# Three recently developed evaluation methods for the automated
     quantitative analysis of X-ray scattering data (small-angle
     (SAXS) and wide-angle (WAXS)) are presented. They are applicable
     to extensive series of 2D patterns that are recorded in studies
     of polymer materials with uniaxial symmetry. The experiments
     comprise time-resolved studies (melting, crystallization,
     mechanical properties and fatigue) as well as microbeam-scanning
     for the study of nanostructure gradients. The methods appear
     suitable to manage the data flood from modern synchrotron
     radiation setups aiming at the extraction of quantitative
     information on the structure evolution inside the material.
        In microbeam-scanning experiments the recorded scattering
     patterns are smeared. It is proposed to reconstruct desmeared
     scattering patterns by an X-ray scattering
     fiber-computer-tomography (XS-FCT). Reconstruction aberrations
     yield additional structure information. The true structure
     variation along the fiber radius is established. Compared to
     general tomography the experiment is faster by a factor of 100,
     and reconstruction is faster by a factor of 10^{4}.    In WAXS
     fiber patterns should first be mapped into reciprocal space
     before analysis. After having corrected an erroneous tilt-angle
     equation, automatic tilt-angle tracking and mapping becomes
     possible.     If polymers fail at low strain, the determination
     of  strain and of structural parameters from the scattering
     patterns require very high accuracy because the observed
     variations are subtle. Suitable methods are presented both for
     the high-precision determination of the macroscopic strain, and
     for the determination of subtle variations of structure
     parameters.