Viscoelasticity of near-critical gels

Journal Article · Sun Nov 27 23:00:00 EST 1988 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.61.2620· OSTI ID:6945892

Martin, J E; Adolf, D; Wilcoxon, J P

Viscoelastic measurements on gels near the gel point show power-law frequency and time dependences. Using a percolation model, we find that viscoelastic properties are described by the universal exponent /Delta/= d/nu//(d/nu/+k) where k is the viscosity exponent, /nu/ is the correlation-length exponent, and d is the dimension of space. This expression leads to a theory for the critical growth of the equilibrium shear modulus beyond the gel point, and the steady-state creep compliance beneath the gel point. Viscoelastic data are given for epoxy resins.

• Research Organization: Sandia National Laboratories, Albuquerque, New Mexico 87185
• OSTI ID: 6945892
• Journal Information: Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 61:22; ISSN PRLTA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
COLLOIDS
CRITICAL TEMPERATURE
DISPERSIONS
EQUILIBRIUM
GELS
PHYSICAL PROPERTIES
RHEOLOGY
SHEAR
THERMODYNAMIC PROPERTIES
TIME DEPENDENCE
TRANSITION TEMPERATURE
VISCOSITY