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
CLA#
COM#
APP#
MAT#
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.