| abstract |
The present invention relates to a poly (arylene ether) copolymer having a sulfonic acid group, a method for preparing the same, and a polymer electrolyte membrane for a fuel cell using the same.n n n The poly (arylene ether) copolymer having a sulfonic acid group according to the present invention is a polymer designed so that the sulfonic acid group is dense while the side chain length of the hydrophilic part is long. There is an advantage that can secure the dimensional stability against moisture. In addition, according to the production method of the present invention, the amount of sulfonic acid groups can be easily controlled by changing the equivalent amount of the sulfonating agent, and the polymer can be prepared by the simplified method, and the polymer electrolyte membrane prepared using the polymer has a water content. In addition to showing high hydrogen ion conductivity even in a low environment, high dimensional stability even when exposed to moisture for a long time, there is an advantage of excellent performance as a polymer electrolyte membrane for fuel cells. |