| abstract |
Presented is a polyelectrolyte composition including a mixed solvent comprising a plurality of solvents with boiling points differing from one another, and polyelectrolyte block copolymers comprising blocks that have ion exchange groups and blocks with substantially no ion exchange groups, wherein the mixed solvent is a good solvent of the polyelectrolyte block copolymers, and solvent A, having the highest boiling point of the solvents of the mixed solvent, is a poor solvent of the polyelectrolyte block copolymers as well as a good solvent of the aforementioned blocks having ion exchange groups. |