| 초록 |
Sulfonated polyimides(SPIs) have been designed to be used as a proton conducting membrane in fuel cells. A series of SPIs containing were synthesized by two-step method polymerization. Material was prepared by the reaction of 4,4'-diaminodiphenyl ether-2,2'-disulfonic acid(ODADS), of p-phenylene diacric acid (PDA), p-phenylene diamine (PDA) and 4,4'-Oxydiphthalic anhydride (OPDA) in 1-Methyl-2-pyrrolidinone (NMP). The sulfonated monomer in the SPIs was varied from 0 to 50 wt %. The molecular structures of the SPIs were analyzed by means of fourier transform infrared spectrometer (FT-IR). Thermal Properties of the synthesized polymers were investigated by means of Thermogravimetric analysis(TGA) and Differential scanning calorimetry(DSC) . In addition, Ion exchange capacity(IEC) and Water Uptake(W.U) indicated high proton conductivity and excellent dimensional stability. |
