申请人:Kuraray Co., Ltd.
公开号:EP2889940A1
公开(公告)日:2015-07-01
Provided is a polymer electrolyte membrane that is formed of a fluorine free material, is soft and hardly cracks, and is excellent in hot water resistance. The polymer electrolyte membrane is obtained by crosslinking a block copolymer (Z) containing a polymer block (A) containing a structural unit derived from an aromatic vinyl compound and having an ion-conducting group; and an amorphous polymer block (B) containing a structural unit derived from an unsaturated aliphatic hydrocarbon and free of any ion-conducting group, the block copolymer (Z) being crosslinked with a crosslinking agent (X) having, in a molecule thereof, two or more aromatic rings of which one or more hydrogen atoms are substituted with hydroxy groups.
本发明提供了一种聚合物电解质膜,该膜由无氟材料制成,质地柔软,不易开裂,并且具有优异的耐热水性。该聚合物电解质膜是通过交联嵌段共聚物(Z)而获得的,嵌段共聚物(Z)包含一个聚合物嵌段(A),该聚合物嵌段(A)的结构单元来自芳香族乙烯基化合物,并具有一个离子导电基团;以及一个无定形聚合物嵌段(B),该无定形聚合物嵌段(B)的结构单元来自不饱和脂肪烃,且不含任何离子导电基团,嵌段共聚物(Z)与交联剂(X)交联,交联剂(X)的分子中具有两个或多个芳香环,其中一个或多个氢原子被羟基取代。