| 초록 |
A series of phenylene based grafting block copolymers were synthesized form biphenyl, 2,2’-biphenol and isatin by superacid catalyzed polyhydroxyalkylation reaction. These polymers have all carbon-carbon structure on polymer backbone without ether linkage. The sulfonalkyl monomer for grafting was prepared from 1,3-propanesulton and potassium bromide. Particularly, the attached sulfoalkyl groups were afforded better stability due to less reactive toward nucleophilic substitution reaction. Moreover, these membranes have good proton mobility because block copolymer membranes were known to have clear microphase separation. The structure of the synthesized polymer was investigated by 1H NMR spectroscopy. These membranes were studied by proton conductivity, water uptake, dimensional stability, and ion exchange capacity (IEC). Also sulface morphologies were assessed by atomic force microscope (AFM). |
