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General relaxation equation , liquid-state

The diffusion behaviour in a rubbery state is generally well described by Pick s laws with constant or concentration-dependent diffusivity. The rate of diffusion is much lower than the rate of relaxation and the polymer chains adjust so quickly to the presence of the liquid that they do not cause diffusion anomalies. The amount of liquid transferred at time t, C, as a fraction of the total amount of liquid transferred at infinite time, is very often expressed as a function of time by the relationship (Equation 11.1) ... [Pg.274]

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Equation liquid

Liquid , generally

Relaxation equation

Relaxed state

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