M. Sc. Jan-Erik Ostwaldt
Institute of Organic Chemistry
University of Duisburg-Essen
Room: S07 S04 C29
Phone: +49 201 183 6251
Research interests: : Solutions of supramolecular polymers with reversed viscosity/temperature profile
In general, liquids have the property that their viscosity decreases with elevated temperatures. Objective of my PhD project is to find an optimal system that behaves differently: the viscosity is supposed to increase with elevated temperatures. Using intramolecular-supramolecular interactions a system can be obtained which is able to form cyclic structures. With rising temperature an entropy-driven ring opening polymerization can be initiated.
The formed polymers show a larger hydrodynamic radius than the cyclic structure, causing a higher viscosity. Due to the usage of supramolecular interactions like hydrogen bonds, the reaction is reversible and at lower temperatures the original viscosity is restored.