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Oxygen dissolution and transport in cobaltporphyrin‐bound organophosphazene membranes
Author(s) -
Nishide H.,
Kawakami H.,
Nishihara S.,
Tsuda K.,
Suzuki T.,
Tsuchida E.
Publication year - 1993
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.1993.220040104
Subject(s) - oxygen permeability , oxygen , membrane , dissolution , polymer , materials science , diffusion , solubility , thermal diffusivity , oxygen transport , fick's laws of diffusion , permeability (electromagnetism) , yield (engineering) , permeation , chemical engineering , thermodynamics , chemistry , organic chemistry , composite material , engineering , biochemistry , physics
Rubbery poly(organophosphazene)s were synthesized, and were combined with cobaltporphyrin (CoP) which binds molecular oxygen rapidly and reversibly. The apparent oxygen‐binding equilibrium constant (K app ) is in proportion to the physical solubility coefficient of oxygen in the polymer, although the reduced equilibrium and thermodynamic parameters are not dependent on the polymer matrix species. Diffusivity of oxygen via the fixed CoP(D C ) is enhanced for poly(organophosphazene) membranes with a larger oxygen diffusion constant. Poly(organophosphazene) membranes with both a large K app and D C yield high oxygen permeability.