Berlin 2005 – scientific programme

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CPP: Chemische Physik und Polymerphysik

CPP 29: POSTER: Polymer physics

CPP 29.53: Poster

Tuesday, March 8, 2005, 16:30–18:30, Poster TU D

Molecular Mobility in Polycarbonate / Silsesquioxane based Nanocomposites. — •Ning Hao, Martin Boehning, and Andreas Schoenhals — Federal Institute for Materials Research and Testing, Unter den Eichen 87, Department VI.3, D-12205 Berlin

Polycarbonate base nanocomposites are prepared by disperse phenethyl substituted polyhedral oligomeric silsesquioxane particles into the host polymer matrix. The sample film are formed by solution casting under room temperature. Further investigation methods confirm a good compatibility of such particles inside polymer bulk phase. The molecular mobility of the nanocomposites are investigated by broadband dielectric relaxation spectroscopy. The main effect is a plasticisation of the segmental dynamics where the localized Fluctuations are only weakly influenced. The shift of the dynamic glass transition temperature is compared with that measured by DSC. Also gas transport measurements (permeation, sorption) are reported.