| 摘要 |
PURPOSE:To form an oxygen-enriching membrane having large PO2 and PO2/ PN2 ratio and excellent strength, durability, chemical resistance, oxidation stability, etc., by using polyaminophosphazene as a constituent. CONSTITUTION:Polyphosphazene is prepared by reaction of polydichlorophosphazene, obtained from thermal polymerization of a cyclic chlorophosphazene, e.g., hexachlorocyclotriphosphazene or octachlorocyclotetraphosphazene, or linear low-molecular weight chlorophosphazene, in the presence or absence of a catalyst in a sufficiently dried system, with a corresponding amine. The gas-separating membrane containing polyphosphazene as a constituent can be easily formed by casting. The preferred concentration of the casting solution is 0.5-30%, more preferably 1-20%. A membrane of a thickness of 0.01-200mum can be obtained from solutions of these concentrations. |
