Dresden 2009 – wissenschaftliches Programm
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SYSO: Symposium Self-organizing Surfaces and Interfaces
SYSO 3: Self-Organizing Surfaces and Interfaces - Posters
SYSO 3.11: Poster
Mittwoch, 25. März 2009, 17:30–19:30, P3
Breakout crystallization in cylinder-forming diblock copolymer thin films — •Christine M. Papadakis1, Charles Darko1, Kordelia Troll1, Zhenyu Di1, Stephan Förster2, Detlef-M. Smilgies3, and Andreas Timmann4 — 1TU München, Physikdepartment E13, Garching — 2Universität Hamburg, Department Chemie — 3CHESS, Cornell University, Ithaca NY, USA — 4HASYLAB at DESY, Hamburg
In thin polymer films, crystallization often leads to fascinating surface structures. We have investigated the long-term behavior of the crystallization in thin films of cylinder-forming poly(isoprene-b-ethyleneoxide), PI-b-PEO. Using optical microscopy, AFM, X-ray reflectometry and grazing-incidence wide- and small-angle X-ray scattering, we have observed breakout crystallization of the PEO. The crystallization of the film was complete only after 150 days. The original hexagonal morphology was destroyed by crystalline lamellae lying in the film plane. The PEO chain stems were perpendicular to the film plane.