The Effect of the Chemical Nature of High Polymers on Gas and Vapor Transport.
Abstract
Two additional high vacuum permeability stations suitable for time lag measurements of the diffusion constants have been built and are very briefly described. The permeabilities, diffusivities and solubilities of helium, neon, argon, oxygen, nitrogen and carbon dioxide have been measured at various temperatures in polyacrylonitrile. The activation energies, heat of solution and the preexponential factors have been calculated. Abnormally low permeability and diffusion constants were found with high activation energies. Some reasons for this behavior are presented. The corresponding transport behavior of helium, neon, argon, krypton and nitrogen in polystyrene has also been measured and the results presented together with the known values for oxygen, and carbon dioxide. (Modified author abstract)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1973
- Accession Number
- AD0763775
Entities
People
- V. T. Stannett
Organizations
- North Carolina State University