A CORRELATION-ANALYSIS OF ISOTHERMAL CRYSTALLIZATION OF LONG PARAFFINS

The small-angle X-ray scattering (SAXS) curves for ultralong n-alkanes obtained by Ungar and Keller at different times after reaching the cr ystallization temperature have been Fourier analysed. The correlation curves so obtained at different temperatures and different annealing t imes reflect sensitively all those morphological features which are br oadly characteristic of the scattering curves. In addition the correla tion curves clearly show a transition from a non-integer-fraction leng th to extended chain structure. Crystalline and amorphous lengths, deg ree of order and half-widths which characterize kinetics of morphologi cal changes are also reported.