Dresden 2006 – wissenschaftliches Programm
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CPP: Chemische Physik und Polymerphysik
CPP 11: POSTER Disperse Polymer Systems
CPP 11.3: Poster
Dienstag, 28. März 2006, 17:00–19:00, P3
Confined Polymers in Microemulsions — •Simona Maccarrone, Henrich Frielinghaus, Jürgen Allgaier, and Dieter Richter — Forschungszentrum Jülich GmbH, Institut für Festkörperforschung,52425 Jülich, Germany
It has been established that amphiphilic diblock copolymers increase the efficiency of surfactants in microemulsions (polymer boosting effect). These studies always considered large oil and water domains of size d compared to the typical polymer size Rg. Thus the confinement parameter Rg/d was small in these first studies. The ongoing studies of this paper consider medium and higher confinement, where small angle neutron scattering measurements reveal a new behaviour, which can be compared to computer simulations by T. Auth. The theory predicts an enhanced sensitivity of the polymer at medium confinement and a reversed behaviour at larger confinement. The higher sensitivity at medium confinement is only slightly visible experimentally, whereas the reversed behaviour (anti-boosting) is clearly present. These results are interesting for applications and interpretations of biological membranes.