Tuesday, 24 May 2005

This presentation is part of: Polymeric Biomaterials Posters

Synthesis and Characterization of Poly(vinyl acetate)-graft-PDMS Copolymers

Sarah E. Grieshaber and Yadunandan L. Dar. National Starch and Chemical Company, Bridgewater, NJ

Polymers with controlled architecture such as block, graft, and radical copolymers demonstrate unique features and significant utility in many fields. The unique interfacial properties of these materials as well as their ability to phase separate at a sub-micron scale have led to the ability to manipulate bulk and interface properties. Two notable examples are the compatibilization of material blends to lead to novel hybrid properties and materials with better bio-compatibility. In particular, materials with siloxane units have been used for their unique biocompatibility as well as the ability to form inorganic silica templates upon calcination. The latter can be used in a variety of applications including catalysis and structured inorganic films and coatings.

This poster describes the synthesis and characterization of graft copolymers with a vinyl acetate backbone with pendant poly(dimethyl siloxane) (PDMS) grafts. The aim of this work was to synthesize these materials and analyze for the amount of copolymerized PDMS. This is not trivial as the separation of the reacted PDMS from the unreacted PDMS macromonomer is not possible using traditional analytical techniques such as soxhlet extraction or precipitation.

The synthesis was conducted by solution polymerization. The analysis included verification of PDMS copolymerization with vinyl acetate and quantifying the level of PDMS macromonomer incorporation.

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