The present invention relates to a block copolymer having at least one block having an acid group and at least one block having substantially no acid group, wherein one end group of a repeating unit in at least one block of all blocks is oxygen and/or sulfur, and at least one repeating unit of a block having substantially no acid group contains a halogen atom. The block copolymer of the present invention gives a polymer electrolyte membrane which is excellent not only in heat resistance and proton conductivity but also in water resistance and chemical stability, and is useful as an electrolyte for a proton conducting membrane etc. of a fuel cell.
本发明涉及一种嵌段共聚物,其具有至少一个具有酸基的块和至少一个基本上没有酸基的块,其中至少一个块的所有块的
重复单元的一个端基团是
氧和/或
硫,并且至少一个基本上没有酸基的块的
重复单元包含一个卤素原子。本发明的嵌段共聚物给出了一种
聚合物电解质膜,该膜不仅具有优异的耐热性和质子导电性,而且具有良好的耐
水性和
化学稳定性,可用作燃料电池的质子导体膜等电解质。