Concentration dependence of diffusivities of penetrants in glassy polymer membranes | Zendy

Sada E. | Zendy; Kumazawa H. | Zendy; Wang J.S. | Zendy

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Concentration dependence of diffusivities of penetrants in glassy polymer membranes

Author(s) -

Sada E.,

Kumazawa H.,

Wang J.S.

Publication year - 1993

Publication title -

journal of applied polymer science

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.575

H-Index - 166

eISSN - 1097-4628

pISSN - 0021-8995

DOI - 10.1002/app.1993.070480601

Subject(s) - methyl methacrylate , polymer , membrane , polymer chemistry , methyl acrylate , copolymer , permeation , materials science , methacrylate , permeability (electromagnetism) , butyl acrylate , thermodynamics , acrylate , chemistry , composite material , biochemistry , physics

Steady‐state permeation rates for pure CO 2 , CH 4 , and O 2 through two kinds of homogeneous dense membranes, copolymer of methyl methacrylate and n ‐butyl acrylate and poly(methyl methacrylate), were measured at three temperatures between 20 and 40°C and upstream pressures up to 3 MPa. The logarithms of the mean permeability coefficients for CO 2 in both membranes increased linearly or quadratically with increasing upstream pressure, whereas the mean permeabilities for CH 4 and CO 2 were independent of pressure. The pressure dependence of the mean permeability coefficient for CO 2 was interpreted in terms of a modified free‐volume model of diffusion for a Henry's law population in glassy polymers. © 1993 John Wiley & Sons, Inc.

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