FIELD: radio engineering, communication.
SUBSTANCE: disclosed is a polymer which is obtained from a polyamine acid or a polyimide, which contains picopores, the polyamine acid and polyimide having a structural repeating unit obtained from an aromatic diamne, which contains at least one functional group which is located in an ortho-position to the amino group, and a dianhydride. Methods of obtaining said polymer from a polyamine acid and a polyimide, as well as an article made from said polymer are also disclosed.
EFFECT: disclosed polymer has high permeability and selectivity for small molecules, high thermal stability, chemical resistance and good solubility.
42 cl, 6 tbl, 55 ex, 12 dwg
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