viscoelastic retardation

vis·co·e·las·tic re·tar·da·tion

a technique for the measurement of the molecular weight of large DNA molecules; the DNA is stretched by hydrodynamic shear forces and, when the molecules relax, the relaxation time is measured.
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References in periodicals archive ?
Behavior Above [T.sub.g]: For creep compliance response changes upon aging, however, there is no apparent change in the characteristic viscoelastic retardation time.
Moreover, it suggests a new fact about molecular orientation: circulating flow in the melt front region and viscoelastic retardation give a V-shaped distribution of principal stress difference even in isothermal simulations, which may explain the second "V" in experimentally observed double V-shaped birefringence patterns near the melt front.