TIT# SAXS data analysis of a lamellar two-phase system. Layer statistics
     and compansion
AUT# Stribeck, N.
SOU# Colloid Polym. Sci. (1993), 271(11), 1007-23
LOC# xv016  @selbst.ftx
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ABS# An analysis of SAXS data from 3 injection-molded poly(ethylene
     terephthalate) (PET) samples is carried out. Two of the samples are
     annealed at different temperatures The chosen concept of data analysis is
     that of Ruland's interface distribution function (IDF) of lamellar
     2-phase system. The IDF can be expanded into a series of distance
     distributions, containing the information on the topol. properties of
     the ensemble of lamellar stacks in the semicrystalline sample. The paper
     describes the stepwise refinement of a topol. model. The final model
     is described by only few parameters of physical meaning. It unifies the
     well-know concepts of an ensemble on non-uniform stacks, finite
     stack size and one-dimensional paracrystalline disorder in an analysis
     expression. To deduce this expression, the concept of inhomogeneity
     (such as a variation of the long period from stack to stack) is
     generally treated in terms of compansion--a suggested superposition
     principle. Its mathematical equivalent in 1 dimension is the Mellin
     convolution.