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Proceedings Paper

Characterization of polymers and particles with the analytical ultracentrifuge
Author(s): Helmut H. Coelfen
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Paper Abstract

This paper describes the application of the analytical ultracentrifuge for the characterization of polymers and colloidal particles. The aim of this review is describing the basic principles and giving an overview over the wide field of possible applications rather than providing an exhaustive theoretical background. After an introduction of the experimental setup, the four basic experiment types: sedimentation velocity experiment, sedimentation equilibrium run, density gradient run and synthetic boundary experiment are introduced. It is explained which kind of information can be derived from which type of experiment. Examples are given for the fractionation of polymers/particles due to their molar mass/particle size in a sedimentation velocity experiment and the fractionation due to the structure achieved in a density gradient run. It is shown that sedimentation equilibrium experiments do not only deliver molar masses but are furthermore very useful for the quantitative characterization of interactions between polymers. Some new trends in analytical ultracentrifugation are outlined as well as some special applications of the analytical ultracentrifuge showing that it is a universal technique for analysis of polymer solutions and dispersions.

Paper Details

Date Published: 30 July 1997
PDF: 28 pages
Proc. SPIE 10291, Materials Characterization and Optical Probe Techniques: A Critical Review, 102910R (30 July 1997); doi: 10.1117/12.279854
Show Author Affiliations
Helmut H. Coelfen, Max-Planck-Institute of Colloids and Interfaces (Germany)

Published in SPIE Proceedings Vol. 10291:
Materials Characterization and Optical Probe Techniques: A Critical Review
Roger A. Lessard; Hilmar Franke, Editor(s)

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