Berlin 2005 – wissenschaftliches Programm

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CPP: Chemische Physik und Polymerphysik

CPP 29: POSTER: Polymer physics

CPP 29.51: Poster

Dienstag, 8. März 2005, 16:30–18:30, Poster TU D

Polymer Crystallization studied on the Nanometer Scale in 3D — •Nicolaus Rehse, Sabine Marr, Sabine Scherdel und Robert Magerle — Physikalische Chemie II, Universität Bayreuth, D-95440 Bayreuth

Semi-crystalline polymers often form extremely different morphologies depending on the crystallization parameters (i.e.cooling rate, crystallization temperature). We have studied semi-crystalline polypropylene films which were prepared via solvent casting and afterwards melted and recrystallized on a heating stage. The crystallization process was followed with in-situ tapping mode scanning force microscopy (TM-SFM) to monitor the crystal growth. Individual crystallites were then investigated with nanotomography. This technique is based on TM-SFM and a subsequent etching process, where the topmost 5-8 nanometers of the sample are removed. The resulting SFM images are stacked and aligned to give a three-dimensional material distribution of the sample. We aim to compare the resulting structures qualitatively using morphological measures and learn more about the processes that lead to different morphologies.