| 초록 |
The gas separation membrane for on-board inerting gas generating systems (OBIGGS) is the best way to avoid damage to the fuel tank and explosion. The aromatic polyimide materials for gas separation membrane have been studied due to good chemical resistance and excellent mechanical strength [1]. The polyimide containg durene diamine and 2,2-bis(3,4-dicarboxyphenyl) hexafluoropropane dianhydride (6FDA) exhibits high gas permeability, but it has low selectivity [2]. In this study, the copolyimides based on 6FDA-durene were synthesized with rigid diamine by chemical imidization in order to overcome the disadvantage. Polyimide obtained via chemical imidization is possible to make at low temperature and good solubility. The copolyimide membranes were prepared by solvent evaporation method to evaluate their gas transport properties using Time-lag at 30 ºC. The chemical structures of prepared copolyimides were confirmed by FT-IR and NMR. The chemical and mechanical properties of copolyimides were evaluated by TGA, DSC, XRD |
