Physical interpretations of various dynamic light scattering data, their interconnections and relations to other relaxation data

Abstract

Dynamic light scattering has been proven to be a useful tool to study relaxations in polymeric and small molecular liquids, fused salts, ionic conductors, etc. We attempt to enhance the physical interpretations of the experimental data with the help of a general coupling theory of relaxations. It is demonstrated by many examples that the ideas and predictions of the coupling theory are matching very well to the experimental data. The relations between Brillouin scattering and photon correlation spectroscopy relaxation data are brought out. Physical meanings of the relaxation parameters become evident. Dynamic light scattering data then can be used to advantage in consideration of other physical phenomena and measurements.