Regensburg 2004 – scientific programme

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CPP: Chemische Physik und Polymerphysik

CPP 15: POSTER: Polymers and Biomaterials

CPP 15.9: Poster

Tuesday, March 9, 2004, 17:00–19:00, B

Phase separation of ternary polymer blend films: A kinetic investigation — •P. Panagiotou¹, E. Maurer¹, R. Cubitt², and P. Müller-Buschbaum¹ — ¹TU München Physik Department LS E13, James-Franck-Str.1, 85747 Garching (Germany) — ²ILL, b.p. 156, 38042 Grenoble (France)

polymers with different molecular weights and glass transition temperatures is investigated with neutron reflectometry and AFM. Thin films were prepared by spin-coating on top of pre-cleaned silicon substrates. Afterwards the samples were annelead yielding changes in the surface morphologies due to phase separation. In a subsequent preparation step the pre-annealed samples were stored under a solvent vapor atmosphere. The resulting morphological changes were monitored in-situ with neutron reflectometry. A high time resolution was achieved by applying a time-of-flight (TOF) mode at the neutron reflectometer D17 at ILL. AFM (atomic force microscopy) pictures the topography resulting in the most prominent length scales parallel to the surface as calculated with 2d-Fourier analysis.