Thermoresponsive polymers with co nonsolvency behavior Despite the popularity of thermoresponsive polymers much is still unknown about their behavior how it is triggered and what factors influence it hindering the full exploitation of their potential. One particularly puzzling phenomenon is called co nonsolvency in which a polymer is soluble in two individual solvents but counter intuitively becomes insoluble in mixtures of both. Despite the innumerous potential applications of such systems including actuators viscosity regulators and as carrier structures this field has not yet been extensively studied apart from the classical example of poly(N isopropyl acrylamide) (PNIPAM) in mixtures of water and methanol. Therefore this thesis focuses on evaluating how changes in the chemical structure of the polymers impact the thermoresponsive aggregation and co nonsolvency behaviors of both homopolymers and amphiphilic block copolymers. Within this scope both the synthesis of the polymers and their characterization in solution is investigated. Homopolymers were synthesized by ...