| 摘要 |
<p>[Problem] To provide a gas separation membrane which dissolves in an organic solvent, exhibits excellent formability, and exhibits excellent gas-separation performance when used as a gas separation membrane. [Solution] A gas separation membrane having a polyimide structure containing a repeating unit represented by general formula (1) (In the formula, R1 represents a bivalent organic group, and R2 represents a tetravalent organic group.), wherein R1 is a bivalent organic group represented by general formula (2) (In the formula, Raa represents a single bond, a sulfur atom, -SO2-, -CH2-, -C(=O)-, -C(CH3)2-, -C(CH3)(CH2CH3)- or -C(CF3)2-, or a bivalent organic group obtained by separating two arbitrary hydrogen atoms from a C3-12 alicyclic hydrocarbon compound or from a C6-25 aromatic hydrocarbon compound. Rab is a C1-6 alkyl group. ac and ad each independently represent an integer of 0-2. 1≤ac+ad≤4. HFIP represents a -C(CF3)2OH group. The line segments intersecting the wavy lines represent the locations of bonds.)</p> |
