Permeability of Noble Gases through Kapton, Butyl, Nylon, and "Silver Shield"
Steven J. Schowalter, Colin B. Connolly, John M. Doyle
TL;DR
This study measures noble gas permeabilities and diffusivities through various materials, providing data useful for estimating radon permeability and understanding material suitability for gas barrier applications.
Contribution
It offers new permeability and diffusivity data for noble gases through Kapton, butyl, nylon, and Silver Shield, including temperature dependence and radon permeability estimates.
Findings
Kapton and Silver Shield have the lowest noble gas permeabilities.
Permeability correlates with noble gas atomic radii.
Data enables radon permeability estimation for studied materials.
Abstract
Noble gas permeabilities and diffusivities of Kapton, butyl, nylon, and "Silver Shield" are measured at temperatures between 22C and 115C. The breakthrough times and solubilities at 22C are also determined. The relationship of the room temperature permeabilities to the noble gas atomic radii is used to estimate radon permeability for each material studied. For the noble gases tested, Kapton and Silver Shield have the lowest permeabilities and diffusivities, followed by nylon and butyl, respectively.
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