The Role of Surfaces in Gas Transport Through Polymer Membranes
This paper describes a procedure to measure the permeability P , diffusivity D, and rate of adsorption k\u003csub\u003e1\u003c/sub\u003e , thus determining the solubility S and rate of desorption k\u003csub\u003e2\u003c/sub\u003e of He, N\u003csub\u003e2\u003c/sub\u003e, O\u003csub\u003e2\u003c/sub\u003e, CH\u003csub\u003e4\u003c/sub\u003e, and CO\u003csub\u003e2\u003c/sub\u003e on a polydimethylsiloxane (PDMS) membrane. The described procedure is able to determine experimentally all the physical quantities that characterize the gas transport process through a thin rubber polymer membrane.