Figure 4
Correlation lengths in the directions normal, dz (filled circles), and parallel, dy (open circles), to the film surface obtained by using Bragg's law and the scattering invariant, P (filled triangles), as a function of polymer concentration (a) for the LA2250 solutions and (b) for the LA4285 solutions. Selected two-dimensional X-ray scattering patterns are also presented in (a) for the LA2250 solutions and in (b) for the LA4285 solutions at various polymer concentrations. |