Abstract
Steady-state flow ofpolymer systems (polymer melts and solutions) in the viscoelastic state is considered the superposition of two processes — flow of a viscous fluid and extrusion of an elastic fluid (elastic state). The dynamic elasticity is proposed for characterizing the elastic properties of polymer systems, and the complex viscosity, which is the total value of the dynamic elasticity and the dynamic viscosity, widely used for assessing viscous properties, is proposed for characterizing the generalized properties, by analogy with periodic deformation.
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