Pressure and Time-Resolved SANS Experiments on Polymer Blends

Abstract

This report deals with SANS experiments for the investigation of polymer blends, referring to our high pressure, and to time-resolved work. The experiments were started in the ELLA (cold neutron) laboratory installed in the KFA Jülich research reactor FRJ-2. Since the FRJ-2 reactor operation was interrupted by technical problems from autumn 1990 until now, the work has continued on other neutron sources, essentially at the SANS instruments at the Risø Research Center and at GKSS Geesthacht. Consequently, part of the presented data (see Figures 3 and 6) was obtained at these instruments (which are quite similar to ours) and not at the FRJ-2. In spite of this problem, we take the opportunity to present a general and brief description of our FRJ-2 cold neutron instrumentation, mainly in small angle scattering, in a separate chapter of the article.