Regensburg 2007 – wissenschaftliches Programm
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DS: Fachverband Dünne Schichten
DS 27: Polymer and Composite Films
DS 27.1: Vortrag
Freitag, 30. März 2007, 09:30–09:45, H32
Structure and Dynamics of laser deposited poly(alkylmethacrylate)s — •Andreas Meschede1, Thorsten Scharf1, Hans-Ulrich Krebs1, and Konrad Samwer2 — 1Institiut für Materialphysik, Universität Göttingen, Friedrich-Hund-Platz 1, 37077 Göttingen — 2I. Physikalisches Institut, Universität Göttingen, Friedrich-Hund-Platz 1, 37077 Göttingen
Thin polymer films were grown by pulsed laser deposition (PLD) at 248 nm in ultra high vacuum and by Matrix Assisted Pulsed Laser Evaporation (MAPLE). The observed films show strongly different chemical, structural and mechanical properties depending on the deposition parameters, especially the laser fluence, which will be discussed with respect to the ablation mechanism. In this study, two poly(alkyl methacrylate)s are studied: poly(methyl methacrylate) (PMMA) and poly(ethyl methacrylate) (PEMA). Having the same backbone, these polymers differ by the size of their sidegroups and consequently their dynamics, which easily can be seen by a decrease in glass transition temperature with increasing side group length. Additional to chemical and morphological characterization, results obtained by mechanical spectroscopy using the Double Paddle Oscillator (DPO) and the Plasma Plume eXcited Reed (PPXR) technique will be presented to clarify the relaxation behaviour and the underlying dynamics.