申请人:SOLVAY (Société Anonyme)
公开号:EP1657274A1
公开(公告)日:2006-05-17
The invention concerns a polybenzazole block copolymer suitable for solid polymer electrolyte membranes application comprising :
at least one block (B1) comprising recurring units (R), more than 50 % of said recurring units comprising at least one benzimidazole group (formula 1a and 1b) and at least one sulfonic acid group (formula 2) [recurring units (R1)];
wherein E in formula 1a can be a substituted or non-substituted carbon atom or nitrogen atom, and Q in formula 1 can be a hydrogen atom or a group comprising a sulfonic acid group;
and
at least one block (B2) comprising recurring units (R'), more than 50 % by moles of said recurring units comprising at least one benzazole group chosen among benzothiazole group (formula 3 a and 3b) and benzoxazole group (formula 4a and 4b) [recurring units (R2)],
wherein E' and E" in formula 3a and 4a, respectively, can be a substituted or non-substituted carbon atom or nitrogen atom, and the block (B2) is free from sulfonic acid groups.
The invention also relates to a polybenzazole polymer composition thereof, a solid polymer electrolyte membrane therefrom, a solid polymer electrolyte doped membrane therefrom, and the fuel cell therefrom.
本发明涉及一种适用于固体聚合物电解质膜应用的聚苯唑嵌段共聚物,包括:
至少一个嵌段(B1),该嵌段包含重复单元(R),其中 50%以上的重复单元包含至少一个苯并咪唑基团(式 1a 和 1b)和至少一个磺酸基团(式 2)[重复单元(R1)];
其中,式 1a 中的 E 可以是取代或未取代的碳原子或氮原子,式 1 中的 Q 可以是氢原子或包含磺酸基的基团;
以及
至少一个包含递归单元(R')的嵌段(B2),以摩尔数计,50% 以上的所述递归单元包含至少一个苯并唑基团,可从苯并噻唑基团(式 3 a 和 3b)和苯并恶唑基团(式 4a 和 4b)中选择[递归单元(R2)]、
其中,式 3a 和 4a 中的 E' 和 E "分别可以是取代或非取代的碳原子或氮原子,嵌段(B2)不含磺酸基团。
本发明还涉及一种聚苯唑聚合物组合物、由其制成的固体聚合物电解质膜、由其制成的固体聚合物电解质掺杂膜以及由其制成的燃料电池。