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Phys. Rev. E 63, 061405 (2001) [9 pages]

Critical behavior of gelation probed by the dynamics of latex spheres

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G. C. Fadda and D. Lairez*
Laboratoire Léon Brillouin, CEA-CNRS, CEA/Saclay, 91191 Gif-sur-Yvette cedex, France

J. Pelta
ERRMECE, Université de Cergy-Pontoise, 95302 Cergy-Pontoise cedex, France

Received 21 November 2000; published 23 May 2001

We report a quasielastic light scattering study of the dynamics of large latex probe particles (R=225nm) in gelatin solution undergoing gelation. We show that by focusing on the short-time and long-time behavior of the autocorrelation function, it is possible to simply interpret out data in terms of the divergence of the viscosity and emergence of the shear elastic modulus near the gel point. Our crude analysis allows us to grasp the critical behavior of gelation and to obtain the two critical exponents of the transport properties.

© 2001 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevE.63.061405
DOI:
10.1103/PhysRevE.63.061405
PACS:
82.70.Gg, 47.50.+d, 83.10.Pp

*Author to whom correspondence should be addressed.

 
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