Guest speaker Dr. Adriana Mihut in Soft Nanoscience group meeting
Friday, 8 January 2010
9.00h room 0.34 / building 170 / Marly
Dr. Adriana Mihut
Physical Chemistry I, University Bayreuth, D-95440 Bayreuth, Germany
Abstract
Self-assembly of crystalline-coil block copolymers in solution has attracted steadily increasing attention during the last years since the resulting morphology may be largely influenced by the crystallizable block. In selective solvents, the insoluble block undergoes chain folding upon crystallization. Thus, the final morphology depends on the interplay of microphase separation of the blocks and crystallization. A substantial challenge is to find ways to control the size and the morphology. In this context, the poly(butadiene)-block-poly( ethylene oxide) block copolymers are a promising model system for developing a general route towards tunable crystalline morphologies.1–3 In this talk, we will discuss how thermally controlled crystallization of the confined PEO micellar core in a selective solvent (n- heptane) leads to well- defined morphologies for PB-b-PEO block copolymers with different sizes and block ratios.
(1) Mihut, A. M.; Chiche, A.; Drechsler, M.; Schmalz, H.; Cola, E. D.; Krausch, G.; Ballauff, M. Soft Matter 2009, 5, 208-213.
(2) Mihut, A. M.; Drechsler, M.; Möller, M.; Ballauff, M. Macromol. Rapid. Commun. 2009, DOI: 10.1002/marc.200900571.
(3) Mihut, A. M.; Crassous, J. J.; Schmalz, H.; Ballauff, M. submitted to Colloid Polym. Sci.