Abstract
A model has been developed to estimate the glass transition temperature of polymer+plasticizer mixtures (up to 30wt% plasticizer). The model is based on the Sanchez–Lacombe equation of state and the Gibbs–DiMarzio criterion, which states that the entropy of a mixture is zero at the glass transition. The polymers studied included polystyrene and poly(vinyl chloride). The plasticizers studied included a wide range of chemicals from methyl acetate to di-undecyl phthalate. The model qualitatively accounted for the effect of different plasticizers on the mixture glass transition temperature.
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