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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 46: Poster II

CPP 46.21: Poster

Donnerstag, 12. März 2026, 09:30–11:30, P5

Characterization of bimodal PMMA-PDMS suspensions using light scattering — •Katharina Gaus and Joachim Wagner — University of Rostock, Rostock, Germany

Poly-dimethylsiloxane coated PMMA particles index matched in tetraline/decaline mixtures are well defined model systems for hard spheres with tunable particle size. Binary mixtures of these core-shell particles with slightly different sizes artificially increase the polydispersity of colloidal model systems preventing crystallization at large volume fractions and thus enabling the preparation of colloidal glasses. Using a priori knowledge of both species' topology, even in the limited range of wave vectors accessible with light scattering experiments, the reliable structural characterization of mixtures is possible. Hence, such binary mixtures are promising model systems for colloidal glasses.

Keywords: colloidal suspensions; light scattering; hard-sphere