Theoretical Consideration of Reduction in Melt Viscosity by Solubilized Gaseous Component

Theoretical Consideration of Reduction in Melt Viscosity by Solubilized Gaseous Component 

1 Depression of Glass Transition Temperature of Amorphous Polymer by the Addition of Low-Molecular-Weight Soluble Diluent 

Gibbs and DiMarzio (1958) appear to have been the first to offer a molecular interpretation, via statistical mechanics, of the depression of glass transition temperature (Tg) of an amorphous polymer by the addition of low-molecular-weight soluble diluents, in terms of the size and stiffness of diluents and the diluent concentration. Subsequently, using both classical and statistical thermodynamics, Chow (1980) derived the following expression, which predicts the T depression of polymer/diluent mixtures  

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