TIT# The analysis of slightly distored SAXS layer-line patterns
     from fibrillar two-phase systems with short-range order
AUT# Stribeck, N.
SOU# Colloid Polym. Sci. (1992), 270(1), 9-16
LOC# xv012  @selbst.ftx
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COM#
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ABS# The information content of small-angle x-ray scattering (SAXS) from
     fibrillar 2-phase polymer systems under strain is discussed. The
     experimentally background is a study of butadiene-styrene starblock
     copolymer rubber samples during elongation using synchrotron
     radiation and a 2-dimensional detector. The samples exhibit a
     layer-line pattern with the slight indication of a 4-point diagram.
     The theoretically considerations are verified using the experimentally data.
     Special pattern are used to describe mathematical peculiarities of the
     pattern and their physical background. The scope of the paper covers
     product separability in cylindrical coordinates and an analysis of the
     separated factors. From the physical point of view, information is gained
     on the validity of the approximation by a 1-dimensional fibrillar system
     and the order within bundles of fibrils. An expression is given for
     the background scattering caused by an ensemble of nonidentical
     oblong particles, organized in bundles of oriented fibrils. The
     difference in the information on the structure, obtainable from
     either section or projection, is discussed.