Journal of Chemical Physics, Vol.116, No.6, 2658-2662, 2002
Concentrated colloidal dispersions: On the relation of rheology with small angle x-ray and neutron scattering
Although rheology as well as neutron and x-ray scattering studies of ordered dispersions have been performed no coherent picture is discussable. In this paper we report our synchrotron x-ray and neutron scattering data of concentrated, charge stabilized, monodisperse polymer colloids and compare them with rheological data. We found that the scattering data can be understood in terms of viscoelastic flow. When ordered by flow-, solid- and liquid-like behavior can be separated with two independent experiments: (a) The solid-like character can be seen at perpendicular incidence as Bragg reflections, (b) the liquid-like character becomes apparent by sample rotation as the intensity distribution along Bragg rods.