Abstract

The phenomenology of the glass transition is briefly reviewed. Four classes of theories for the transition are discussed: rheological theories that account for the temperature dependence of the viscosity and/or relaxation time τ p ; kinetic theories that predict the form of the relaxation function M p ; relaxation theories that explain both the form of M p and the temperature dependence of τ p ; and phenomenological theories that describe the kinetics of relaxation without reference to a microscopic model.

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