Berlin 2008 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 34: POSTERS Polymerphysics
CPP 34.55: Poster
Donnerstag, 28. Februar 2008, 17:00–19:30, Poster A
Phase behavior of polyelectrolyte multilayer investigated by thin film calorimetry — •Heiko Huth1, Renate Müller2, Andreas Fery3, and Christoph Schick1 — 1Universität Rostock Institut für Physik, Universitätsplatz 3, 18051 Rostock — 2MPI für Kolloid- und Grenzflächenforschung, Am Mühlenberg, 14424 Potsdam — 3Universität Bayreuth Physikalische Chemie II, Universitätsstr. 30, 95447 Bayreuth
Polyelectrolyte multilayer can be easily assembled using spraying or dipping of the different polyelectrolytes [1]. The thickness of the produced layers (nanometer range) is well controlled by the preparation conditions. Only a few methods are available for dynamic investigations, as afm for mechanical properties [2].
AC-chip calorimetry is used as a very sensitive tool for calorimetric investigations of such thin films as demonstrated for thin polymeric films [3]. To investigate the phase behavior of polyelectrolytes the humidity is used as a new parameter in addition to temperature for calorimetry. First measurements with the modified calorimeter for the PSS/PDADMAC polyelectrolyte multilayer system are shown. Further extensions of the calorimeter for better understanding of the phase behavior are discussed.
[1] Decher, G. and J.D. Hong, Phys. Chem. Chem. Phys., 1991. 95(11): 1430.
[2] Mueller, R., et al. Macromolecules, 2005. 38(23): 9766.
[3] Huth, H., Minakov, A. A., Schick, C., J. Polym. Sci. B Polym. Phys. 2006 44: 2996.