Dresden 2009 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 28: POSTERS Interfaces and Thin Films
CPP 28.10: Poster
Mittwoch, 25. März 2009, 17:00–19:00, P3
Solvent content in thin spin-coated polymer nanocomposite films — •Jan Perlich1, Ezzeldin Metwalli1, Mine Memesa2, Robert Georgii3, Jochen S. Gutmann2,4, and Peter Müller-Buschbaum1 — 1TU München, Physik-Department LS E13, James-Franck-Str. 1, 85748 Garching (Germany) — 2Max-Planck Institute for Polymer Research, Ackermannweg 10, D-55128 Mainz (Germany) — 3FRM-II, TU München, Lichtenbergstr. 1, 85747 Garching (Germany) — 4Inst. Phys. Chem., Johannes Gutenberg Universität, Jakob-Welder-Weg 10, 55099 Mainz (Germany)
The amphiphilic diblock copolymer P(S-b-EO) is used as template to synthesize nanocomposite films composed of ordered titania nanoparticles. In this approach a so-called "good-poor solvent pair" induced phase separation process is coupled with sol-gel chemistry. As result of the complex force balance, different nanocomposite morphologies can be obtained by adjusting the relative weight fractions between the sol-gel components, i.e. 1,4-dioxane, HCl and titania precursor. Directly after spin-coating the thin polymer nanocomposite films are investigated with neutron reflectivity (NR). The use of deuterated solvents generates contrast for the NR experiment. In NR a narrow range around the critical edge of total external reflection is probed with high resolution. Due to the high sensitivity of the position of the critical edge on the ratio of protonated P(S-b-EO) and deuterated solvent (1,4-dioxane), the exact position of the critical edge enables to determine the content of remaining solvent. The focus is on the systematic variation of the sol-gel components addressing different morphologies.