Dresden 2011 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 36: Poster: Nanoparticles and Composite Materials

CPP 36.6: Poster

Mittwoch, 16. März 2011, 17:00–19:00, P2

Dielectric and Thermal Investigation of adsorbed Poly(vinyl acetate) on Silica Particles — •Marieke Füllbrandt, Purv Purohit, and Andreas Schönhals — BAM Federal Institute for Materials Research and Testing, Unter den Eichen 87, 12205 Berlin, Germany

Dielectric Relaxation Spectroscopy (DRS) is applied in a broad frequency (10-1 - 106 Hz) and temperature range (178-423K) on samples with different amounts of polymer adsorbed on silica particles. DRS probe the interface at the polymer and silica. Two relaxation processes can be identified, one corresponding to the bulk polymer and other related to the interfacial molecules of polymer and silica where the dynamic glass transition is shifted to higher temperature due to reduced mobility.

Further investigations were done to obtain information about concentrations and bound carbonyl fractions of surface adsorbed Poly(vinyl acetate) using thermogravimetric analysis (TGA) and Fourier Transform Infrared Spectroscopy (FTIR) measurements.