Berlin 2005 – wissenschaftliches Programm
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CPP: Chemische Physik und Polymerphysik
CPP 5: SYMPOSIUM: Dynamics of multi-component fluids POSTER
CPP 5.13: Poster
Freitag, 4. März 2005, 17:15–19:00, Poster TU D
Phase-separation by evaporating polymer blend solution subjected to flow — •P. Müller-Buschbaum1, E. Bauer1, S. Pfister1, S.V. Roth2, M. Burghammer2, C. Riekel2, U. Thiele3, and C. David4 — 1TU München, Physik-Department E13, James-Franck-Str. 1, D-85747 Garching, Germany — 2ESRF, BP 220, 38043 Grenoble Cedex 09, France — 3MPI f. Physik komplexer Systeme, Nöthnitzer Str. 38, D-01187 Dresden, Germany — 4Laboratory for Micro- and Nanotechnology, PSI, CH-5232 Villigen, Switzerland
Multiscale polymeric patterns resulting from flow of a binary polymer blend solution of polystyrene and poly-n-buthylacrylate in toluene on an inclined substrate are analysed with sub-microbeam GISAXS [1] and real space techniques. The locally isotropic phase-separation structure on the 1 micron level is embedded in a super structure on the 100 micron level of stripe-like variations of film thickness and composition oriented perpendicular to the flow direction. The multiscale pattern result from the interplay of evaporation, convective flow, diffusion and spinodal decomposition.
[1] P.Müller-Buschbaum, S.V.Roth, M.Burghammer, E.Bauer, S.Pfister, C.David, C.Riekel, Physica B at press