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The Physics of Deformation and Fracture of Polymers by Ali Argon

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5 Linear viscoelasticity of polymers

5.1 Introduction

As discussed in Chapter 2, the molecular structure of polymers, whether glassy or semi-crystalline, incorporates a significant component of disordered material containing a certain fraction of free volume or a liquid-like material environment, depending on the thermal history of the polymer. The subject of this chapter is the small-strain reversible response of such polymeric materials and structures under stress that we refer to as linear viscoelasticity.

At a temperature below inline an applied stress, well below yield, produces in regions of free volume of the polymer local time-dependent, ...

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