Solvent driven formation of micellar structures at the free interface of diblock copolymer films
We plan to follow the formation of micellar structures in solution cast samples during solvent evaporation of selective solvents using in-situ neutron reflectivity (NR). Two diblock copolymers will be addressed, one consisting of 50 wt% n-butylmethacrylate (PnBMA) and 50 wt% deuterated styrene (dPS) and one copolymer consisting of 65 wt% PnBMA and 35 wt% dPS. By the use of a selective solvent for the PnBMA block we create micelles in the solution which is subjected to drying. We plan to investigate the interplay between film formation and drying. The FIGARO reflectometer offers the necessary horizontal geometry along with a very high flux for the desired high time resolution in this in-situ experiment. Together with the recently performed experiment using non-selective solvents we will get a full understanding on in-situ structure formation in diblock copolymer films out of drying solutions.
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MUELLER BUSCHBAUM Peter; GUTFREUND Philipp; METWALLI Ezzeldin; MOSEGUI GONZALEZ Daniel and SCHINDLER Markus. (2013). Solvent driven formation of micellar structures at the free interface of diblock copolymer films. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.9-11-1638