| 초록 |
In this study, sulfonated poly(sulfide sulfone imide) copolymers were successfully synthesized, and the polymer electrolyte membranes were characterized with physical properties and electrochemical performances. The obtained new polymers containing flexible sulfide bond and six-membered imide ring were synthesized in m-cresol, at 180 oC, by random polycondensation. Two types of membranes were prepared by using different non-sulfonated diamine to verify effects of the hydrophobic component. IEC values were controlled by the degree of sulfonation ranging from 50 to 80 %. All the membranes shows good thermal stability and high mechanical strength. Dimensional stablility of membranes exhibits excellent properties. Proton conductivity of two types of membranes composed of different non-sulfonated diamine shows different behavior and displays relatively high correlation with dimensional stability. Furthermore, well separated hydrophilic/hydrophobic membranes morphology was observed. |
