Abstract
In this work, the theory of dynamic light scattering from nonentangled polymers in solution is developed. Based on our previous results for the joint Rouse and Zimm beadspring model of the dynamics of a single polymer and taking into account the influence of other polymer coils on the hydrodynamics of the solution, the dynamic structure factor (DSF) of a chosen test polymer is calculated. The DSF and its first cumulant essentially depend on polymer draining and the concentration of the coils. The tendency of the screening of hydrodynamic interactions is demonstrated on the concentration dependence of the bead mean-square displacement and the DSF. The dynamic nature of this screening is a natural consequence of the theory. The first cumulant of the DSF is studied as a function of the scattering vector k, the draining of the polymers and their concentration, and compared to the Rouse and Zimm limits and the well-known simple laws for the scattering at small and large k.
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Tothova, J., Brutovsky, B. & Lisy, V. Draining and concentration effects in dynamic light scattering from nonentangled polymers in solution. Laser Phys. 17, 443–447 (2007). https://doi.org/10.1134/S1054660X07040214
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DOI: https://doi.org/10.1134/S1054660X07040214