J. Phys. II France
Volume 5, Numéro 3, March 1995
Page(s) 437 - 443
DOI: 10.1051/jp2:1995132
J. Phys. II France 5 (1995) 437-443

Comparison Between the Elasticity of Polyacrylamide and Polyacrylic Gels

L. Benguigui

Solid State Institute and Physics Department, Technion-Israel Institute of Technology, Haifa 32000, Israel

(Received 25 March 1994, received in final form 7 November 1994, accepted 16 November 1994)

We measured the Young modulus E of polyacrylamide and polyacrylic gels as a function of the crosslink and polymer concentrations. We found that the variation of E with these two parameters is completely different for the two kinds of gels. For the polyacrylic gels, E is an increasing function of the crosslink and polymer concentrations. However, in the case of the polyacrylamide gels, E increases with polymer concentration but not always with the crosslink concentration. For low polymer concentrations, E may saturate or exhibit a maximum when increasing the crosslink concentration. We proposed qualitative interpretations to explain this different behavior.

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