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Proceedings Paper

Probe diffusion in polymer solutions
Author(s): George D. J. Phillies
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Paper Abstract

Applications of quasi-elastic light scattering spectroscopy (QELSS) to the study of protein and polymer solutions are discussed. In binary systems, quasielastic light scattering measures the mutual diffusion coefficient Dm of the macromolecules. For spherical macromolecules, Dm and its concentration dependence can be quantitatively interpreted in terms of hydrodynamic and direct interactions between the diffusing particles in solution. Also discussed are optical probe experiments, in which QELSS spectra of ternary probe: matrix polymer: solvent systems are obtained. The diffusion of dilute probes through a complex probe:matrix system reveals detailed information about the dynamics of the matrix. A direct extension of the orthodox theory for interacting, diffusing spheres successfully describes the dynamics of random-coil polymers in solution. Probe diffusion and other measurements of polymer transport coefficients suffice to reject some alternative models of polymer dynamics.

Paper Details

Date Published: 1 June 1991
PDF: 14 pages
Proc. SPIE 1430, Photon Correlation Spectroscopy: Multicomponent Systems, (1 June 1991); doi: 10.1117/12.44161
Show Author Affiliations
George D. J. Phillies, Worcester Polytechnic Institute (United States)

Published in SPIE Proceedings Vol. 1430:
Photon Correlation Spectroscopy: Multicomponent Systems
Kenneth S. Schmitz, Editor(s)

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