Regensburg 2013 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 18: Poster: Polymer Dynamics

CPP 18.18: Poster

Dienstag, 12. März 2013, 18:15–20:15, Poster C

Dielectric spectroscopy on polymer loaded microemulsions based on C12E4 — •Andreas Bischof, Andreas Weber, Christina Lederle, and Bernd Stühn — Experimental Condensed Matter Physics, TU Darmstadt

We study the droplet phase of pure and polymer loaded nonionic w/o microemulsions composed of the surfactant C12E4 by the combination of different experimental methods, e.g. light transmission, dielectric spectroscopy and SAXS.

For different droplet sizes and concentrations the phase behaviour and structure are well understood. It is known that the addition of a polymer to a microemulsion may change structure and dynamic of the droplets. For an investigation of the effect on dynamics we compare the dielectric spectra of the pure microemulsion and of microemulsions loaded with the water soluble PEG. We found several relaxations, varying in relaxation time and strength, depending on the structural and dynamical changes and applied temperature.

Further we observe a strong effect of system composition and polymer concentration on the stability of the droplet phase. We will discuss the dielectric ralaxations in pure and polymer loaded systems.