Synthesis, properties and dynamics of novel non-polymeric high-Tg glass formers and their mixtures with low-Tg components

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In recent years, non-polymeric (molecular) high-Tg glass formers have gained more and more attention with respect to particular material properties. Aim of the research project, on the one hand, is the syntheses of novel high-Tg glass formers and the establishment of structure-property relations with regard to high stability against crystallization and thermal degradation. On the other hand, such high-Tg glass formers are to be used for preparing dynamically asymmetric binary glasses with a low-Tg component. Here the aim is to prepare stable amorphous mixtures with a Tg contrast of the components higher than 250 K. Such systems can be considered as models for mixtures of large and small interacting particles, which are currently studied by simulations as well as in colloidal systems. In order to achieve a component-selective characterization of the dynamics, the selected components have to be isotope-labelled. As experimental methods we want to employ 2H, 13C and 31P NMR as well as dielectric spectroscopy. In continuation of the well investigated and documented dynamics of bulk glass formers, the present project intends to establish the full phenomenology of the dynamics in such asymmetric binary glasses and to compare it to theoretical predictions as well as simulations.