Tuesday, 24 May 2005
747

This presentation is part of: Polymeric Biomaterials Posters

Biodegradable polymer with different morphologies formed by precipitation with super- and sub-critical antisolvent

Ke Wu, Jianjun Luo, and Jing Li. Rutgers,The State University of New Jersey, Piscataway, NJ

Different morphologies of a model biodegradable polymer are achieved by precipitation with super- and sub-critical antisolvent CO2 under a systematic manipulation of process variables. Spherical and/or fibrous products are produced with narrow particle size distribution. The effect of operation parameters on the size and morphology of the processed polymers is discussed herein. In addition, an effort to correlate chemical structure of the unprocessed polymer with physical characters of final product is made by qualitative comparison with literature. It turns out mass transfer, phase behavior, hydrodynamics are competing factors depending on chemical features of the target polymers. As a result, it is possible to better control the size and morphology of polymeric materials through this ″green″ processing technique.

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