| 초록 |
Proton exchange membrane (PEM) is one of the key materials for polymer electrolyte membrane fuel cells (PEMFCs), which require high proton conductivity, high thermal, chemical and mechanical stability and low fuel permeability. Among the numerous types of PEMs, arylene-based polymers are attracting much more attention as alternatives to Nafion® due to high thermal, mechanical stability and low production cost. In this study, we synthesized novel diblock copolymers composed of poly(arylene ether) and poly(sulfonated styrene-co-acrylonitrile). Several diblock copolymers with different hydrophilic chain length and degree of sulfonation were synthesized by controlling the reaction time and the amount of sulfonation reagent, and the fuel cell performance were examined in term of the block chain length and the degree of sulfonation. The diblock copolymers retain high proton conductivity over 100 °C due to their inherent high thermal stability, and also show high dimensional stability |
