Berlin 2008 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 34: POSTERS Polymerphysics

CPP 34.47: Poster

Thursday, February 28, 2008, 17:00–19:30, Poster A

Microdomain Dynamics in Thin Films of Blockcopolymer Melts with Highly Ordered Cylinder Morphology — •Peter Fey, Christian Riesch, Sabine Rehse, Nicolaus Rehse, and Robert Magerle — Chemische Physik, TU Chemnitz, 09107 Chemnitz

We study a polystyrene-block-polybutadiene copolymer melt which forms cylinders in the bulk. With a shearing device based on a rubber stamp large areas of cylinders oriented parallel to the surface are produced in films of a thickness equivalent to one or two cylinder layers. After alignment, the film surface is imaged with tapping mode atomic force microscopy. It allows in-situ observation of the polymer melt during annealing at high temperatures (≈ 100 - 120^∘C). The fluctuations of the orientation and width of cylinders is quantified using image processing algorithms, such as local Fourier transformations. Our goal is to achieve a better understanding of microdomain shape fluctuations in thermal equilibrium. Specimens with different degree of alignment are used to study the influence of defects on the observed dynamics.