Gas and Vapor Sorption and Diffusion in Poly(ethylene terephthalate) and Poly(ethylene terephthalate-co-2, 6-naphthalate)

摘要

Poly(ethylene terephthalate) (PET) is a widely used barrier packaging material. Coplymers of PET and poly(ethylene 2,6-naphthalate) (PEN) are of sikgnificant commercial interest since the addition of PEN to PET improves gas barrier properties and increases glass transition temperatures. This presentation will describe characterization of organic vapor sorption and transport in PET results are used, along with available literature data, to formulate correlations of solubility with penetrant critical temperature and diffusivity with penetrant critical volume. Acetone diffusion coefficients decrease 93