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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.