abstract |
[problem] is the present invention is intended to provide a kind of excellent gas separation membrane of separating property of gas when being dissolved in that organic solvent, mouldability are excellent, using as gas separation membrane.The gas separation membrane of [solution] present invention has polyimide structures, the polyimide structures have formula (1) (in formula, R 1 Represent divalent organic group and R 2 Represent quadrivalent organic radical group.) shown in repetitive, R 1 Divalent organic group shown in formula (2) or the divalent organic group shown in formula (3). |