Article,

Physical aging of polymers

.
Progress in Polymer Science, 20 (4): 703--760 (January 1995)
DOI: 10.1016/0079-6700(94)00001-i

Abstract

The general area of physical aging of polymers is reviewed. Various phenomenological aspects are introduced and discussed in terms of bulk structural changes evidenced by dilatometric and calorimetric studies, and are compared with the wide variety of information available from microstructural investigations involving spectroscopic and scattering techniques. Current models for describing the relaxation kinetics of the non-equilibrium glassy state are compared. Finally, the effects of physical aging on mechanical properties are reviewed, highlighting especially those areas which remain controversial.

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