TIT# Small-angle x-ray scattering from a thermotropic random copolymer
     during solid-state annealing
AUT# Wilson, D. J.; Seifert, S.; Stribeck, N.; Windle, A. H.;
     Zachmann, H. G.
SOU# Acta Polym. (1995), 46(5), 373-8
LOC# xv022  @selbst.ftx
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ABS# The effect of solid-state annealing on the structure of a liquid
     crystalline polymer composed of 80% 4-hydroxybenzoic acid (HBA)
     and 20% 2-hydroxy-6-naphthoic acid (HNA) was studied using
     small-angle x-ray scattering.
     Two-dimensional diffraction patterns possessing strong meridional
     reflections were recorded using synchrotron radiation at temperatures of
     215, 251 and 269°.  The long period increased with increasing
     anneal temperature (Tan), but was largely unaffected by increasing the
     time at Tan.  The intensity of meridional scattering increased with
     increasing both Tan and time.  In order to obtain an estimate for the
     average crystallite thickness at Tan temperature, the small-angle meridional
     scattering was evaluated by means of the interfacial distribution
     function approach.