# Gordon-Taylor and Fox Equations for Glass Transition Temperature

Gordon-Taylor and Fox Equations for Glass Transition Temperature

The glass transition of binary mixtures of compatible or plasticized polymers usually occurs in a temperature region that is intermediate between the transition temperature regions of the two components. The Fox and Gordon–Taylor equations are two simple algebraic models used to identify this intermediate temperature region. This Demonstration offers a graphical and numerical comparison of the two models for a wide range of hypothetical mixtures. It computes and plots the representative glass transition temperature versus the weight fraction of one component (e.g., the plasticizer's). You can vary the representative glass transition temperatures and of the two ingredients and the value of the constant in the Gordon–Taylor model.

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