Regensburg 2007 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 7: POSTER: INTERNAL SYMPOSIUM Scattering Experiments
CPP 7.18: Poster
Montag, 26. März 2007, 16:00–18:00, Poster B
Side chain crystallization in soft and rigid confinement — •E. Hempel1, H. Budde2, M. Hahn2, and M. Beiner1 — 1Martin-Luther-Universität Halle-Wittenberg, Institut für Physik, D-06099 Halle (Saale), Germany — 2Fraunhofer Pilotanlagenzentrum für Polymersynthese und -verarbeitung, Value Park, Bau A74, D-06258 Schkopau, Germany
The side chain crystallization of poly(n-octadecyl methacrylate) [PODMA] under confinement is studied in a series of microphase-separated block copolymers containing PODMA cylinders with diameters in the range 10-20nm. The glass temperature of the matrix is systematically varied in the range 50...-30°C by choosing amorphous poly(n-alkyl methacrylates) with three to eight alkyl carbons per side chain as second component of the block copolymer. Since the crystallization temperature of the PODMA block is about 25°C crystallization occurs either in a glassy or in a highly viscous environment. The influence of the matrix properties on crystallization kinetics and internal structure of the PODMA domains is investigated by DSC and X-ray scattering. A central question of this study is whether or not the block copolymer morphology is changing due to side chain crystallization in the PODMA domains under conditions where the matrix material is soft and chemically not too different from the crystallizable component.