Dresden 2003 – wissenschaftliches Programm
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CPP: Chemische Physik und Polymerphysik
CPP 22: POSTER C
CPP 22.35: Poster
Donnerstag, 27. März 2003, 12:00–14:00, ZEU/250
Adsorption of rigid rod polymers at the liquid / solid interface, their structure formation, and the investigation of the formed films by different physical methods — •Giso Pfütze1, Peter Müller-Buschbaum2, and Manfred Stamm1 — 1Institut für Polymerforschung Dresden e.V:, Dresden — 2TU München, Physik Department LS E13, Garching
Different polymers with a stiff chain backbone ranging from nonpolar via polar to polyelectrolyte polymer were adsorbed from solution onto silicon surfaces. The thicknesses in the order of nanometers were determined by Null-ellipsometry. In that way adsorption isotherms are obtained with no saturation, and even from the Langmuir type. In the case of the adsorption of the polar polymer from toluene the saturation is reached at about 1 g/l, the polyelectrolyte reaches saturation at concentrations less than 10 mg/l. The structures of the formed layers were investigated by scanning force microscopy (SFM). The morphologies found are smooth layers, parallel arranged strands, and randomly arranged rod-like micelles. To get information over a larger area some samples were also investigated by grazing incidence small angle x-ray scattering (GISAXS). This method give informations about the mean in plane length perpendicular to the x-ray beam.