Determination of the interface distribution function of lamellar two-phase systems

The concept of interface distribution functions [Ruland (1977). Colloid Polym. Sci. 255, 417-427] has been applied to the evaluation of the small-angle scattering of a series of polyethylene samples. The results indicate that the statistics of the lamellar stacking is not necessarily determined by next-neighbor interactions and that non-negligible volume fractions of amorphous domains outside the lamellar systems are observed in a number of samples.