A Multilayer Theory for Gas Sorption

A multilayer model is proposed which predicts the equilibrium sorption isotherms for pure gases in Part I and for binary gas mixtures in Part II. This first part deals with the sorption of a pure gas or vapor, particularly by polymers. The model and equations are significantly different from those presently most used. The model gives good fits to the data against which it has been tested, particularly when used with sigmoidal isotherms. It allows the thermodynamic parameters to be calculated and gives important knowledge about the distribution and location of sorbed species.