Synthesis and properties of partially fluorinated poly(arylene ether) block copolymers containing ammonium groups as anion conductive membranes

Hideaki Ono, Junpei Miyake, Byungchan Bae, Masahiro Watanabe, Kenji Miyatake

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Synthesis and properties of aromatic block copolymers containing fluorinated phenylene and biphenylene groups and ammonium-substituted fluorene groups are reported. High-molecular-weight poly(arylene ether) block copolymers were prepared from the corresponding telechelic oligomers and were chloromethylated. Quaternization reaction of the chloromethylated precursors with trimethylamine provided the title ammonium-substituted block copolymers (QPE-bl-4). The QPE-bl-4 membrane with the highest ion-exchange capacity (IEC = 1.3 mequivg-1) showed high hydroxide ion conductivity (45 mS cm -1) at 80 °C due to its phase-separated morphology with interconnected ion-transporting pathway. The accelerated stability test in aqueous KOH solution containing hydrazine revealed that the ammonium groups decomposed to certain extent while the polymer main chains were rather robust to maintain the self-supporting membranes.

Original languageEnglish
Pages (from-to)663-670
Number of pages8
JournalBulletin of the Chemical Society of Japan
Volume86
Issue number5
DOIs
Publication statusPublished - 2013
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)

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