Using rheometry and light scattering, we have studied the viscoelasticity of gels formed by the kinetically arrested phase separation in an emulsion−polymer mixture; to prevent the gels from collapsing under their own weight, we have used an isopycnic solvent. At constant osmotic pressure (set by the polymer concentration) and droplet volume fractions φ well above the gelation transition, we find the elastic modulus to increase roughly linearly with φ, indicating an entropic elasticity based on the cluster packing.
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MELLER et al. (1999) studied this question.
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