Viscoelasticity and Poroelasticity in Elastomeric Gels

摘要: An elastomeric gel is a mixture of polymer network and solvent. In response to changes in mechanical forces the chemical potential solvent environment, evolves by two concurrent molecular processes: conformational change network, migration The processes result viscoelasticity poroelasticity, are characterized material-specific properties: time viscoelastic relaxation effective diffusivity through network. properties define length. length enable us discuss macroscopic observations made over different lengths times, identify limiting conditions which poroelastic relaxations have either completed or yet started. We formulate model homogeneous deformation, use several examples illustrate viscoelasticity-limited migration, where pronounced, but size so small that rate limited viscoelasticity. further describe theory inhomogeneous states. Both infinitesimal finite deformation considered.