A New Gas/Supercritical Fluid (SCF) Diffusivity Measurement Method for CO_2 Saturated Polymer Systems Using Optical Transmission Property

摘要

Over the last century, polymer processes involving gas or supercritical fluid (SCF) have attracted significant attention. The attributes of a gas/SCF in polymers benefited many polymer processing applications. In many applications, the solubility and diffusivity of a gas/SCF in polymers are important parameters. A method of using an optical property to predict the solubility and diffusivity of a gas/SCF in polymers was investigated in this study. Poly(dimethylsiloxane) (PDMS) and supercritical CO_2 were used to study the relationship between its optical property and solubility & diffusivity. The optical transmission intensity decreased as pressure increased..