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    Uncrosslinked, High Molecular Weight, Polyimide Polymer Containing A Small Amount Of Bulky Diamine

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    Date
    2017-08-01
    Author
    Miller, Stephen Joseph
    Koros, William John
    Li, Nanwen
    Liu, Gongping
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    Abstract
    One method as described herein relates to making a membrane comprising an uncrosslinked high molecular weight polyimide polymer with a small amount of bulky diamine. Also as described herein is a hollow fiber polymer membrane comprising an uncrosslinked high molecular weight polyimide polymer with a small amount of bulky diamine. The polyimide polymers include monomers comprising dianhydride monomers, diamino monomers without carboxylic acid functional groups, and optionally diamino monomers with carboxylic acid functional groups, wherein 2 to 10 mole % of the diamino monomers are bulky diamino compounds and the ratio of diamino monomers with carboxylic acid functional groups to diamino monomers without carboxylic acid functional groups is 0 to 2:3. These uncrosslinked high molecular weight polyimide polymers with a small amount of bulky diamine are useful in forming polymer membranes with high permeance and good selectivity that are useful for the separation of fluid mixtures.
    URI
    http://hdl.handle.net/1853/59597
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    • Georgia Tech Patents [1761]

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