Dresden 2006 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe

CPP: Chemische Physik und Polymerphysik

CPP 11: POSTER Disperse Polymer Systems

CPP 11.37: Poster

Dienstag, 28. März 2006, 17:00–19:00, P3

On the way to nano-porous polymer foams — •Francisco Camacho-Gonzalez, Johann G. Leonhartsberger, Mario Dansachmueller, Simona Bauer-Gogonea, and Siegfried Bauer — Soft Matter Physics, Johannes Kepler University, Altenberger Str. 69, A-4040 Linz, Austria

Electromechanical effects in polymers, like piezoelectricity and electrostriction are employed in transducers and photonics. With the formation of micron-sized voids, soft cellular polymers with huge piezoelectric effects and ferroelectric-like behavior were developed. Micron-sized voids are advantageous for transducer applications, but they prevent the materials to be used in photonics. For photonics applications it might be interesting to have soft polymers with voids in the submicron region. Amorphous polymers and elastomers were foamed under supercritical conditions of CO2 at different temperatures. Transmission electron microscope (TEM) images show the formation of nano-voided structures in the polymer matrix when samples are saturated under optimal conditions. Saturation at higher temperatures lead to larger voids (in the micrometer range). Samples treated at lower temperatures show not much change in the matrix structure.