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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 39: POSTERS Colloids and Liquids

CPP 39.9: Poster

Donnerstag, 26. März 2009, 17:00–19:30, P3

Phase behaviour studies of novel smart microgels based on copolymers of NIPAM and N-substituted acrylamides — •Yvonne Hertle, Christoph Hasenöhrl, and Thomas Hellweg — Universität Bayreuth, Physikalische Chemie I, Universitätsstr. 30, 95447 Bayreuth, Germany

Microgels made of N-isopropyl-acrylamide (NIPAM) are the most studied water-swellable microgel systems with a lower critical solution temperature (LCST) of ~ 32°C in water. This thermoresponsive behaviour can be strongly influenced by co-polymerisation with other organic comonomers. In this contribution thermoresponsive copolymer microgel networks made of N-isopropyl-acrylamide and other N-substituted acrylamides are presented. We use scattering techniques as light and neutron scattering to study the phase transition behaviour and the shape of the microgel particles in the swollen state. For characterisation of the particle shape in the totally collapsed state and their size distribution imaging methods such as transmission and scanning electron microscopy (TEM, SEM) are suitable.