| 초록 |
Recently, Thermally Rearranged (TR) polymer membranes has been focused on its extraordinary gas separation properties which are resulted from thermal rearrangement of polyimide with ortho-functional group (PIOFG). In this study, precursor polyimides were synthesized by conventional chemical imidization process of poly(amic acid) containing hydroxyl group (HPAA), and the phase inversion phenomena was investigated to obtain asymmetric membranes of PIOFG based on the study of physical properties such as viscosity, phase separation property. PIOFG asymmetric membranes were prepared and converted to TR asymmetric membranes by thermal rearrangement. |
