J. Phys. II France
Volume 4, Number 4, April 1994
Page(s) 715 - 722
DOI: 10.1051/jp2:1994158
J. Phys. II France 4 (1994) 715-722

Brillouin light-scattering from poly(acrylic acid) hydrogels

S.C. Ng, L.M. Gan, Y. Li and T.H. Chieng

Department of Physics, National University of Singapore, Kent Ridge, Singapore 0511

(Received 13 July 1993, received in final form 22 December 1993, accepted 3 January 1994)

The Brillouin shift and width for poly(acrylic acid) hydrogels have been obtained as a function of gel network volume fraction using a five-pass Fabry-Pérot interferometer. A conspicuous peak has been observed in the Brillouin shift at high volume fraction. The results are discussed in the light of a theory for the Brillouin light-scattering from gels proposed by Marqusee and Deutch.

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