Ladder-type aromatic block copolymers containing sulfonated triphenylphosphine oxide moieties as proton conductive membranes

Yaojian Zhang, Junpei Miyake, Ryo Akiyama, Kenji Miyatake

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The synthesis and characterization of ladder-type aromatic block copolymers containing sulfonated triphenylphosphine oxide moieties (LadP-SPE) are reported. Through aromatic nucleophilic substitution polycondensation and Pd-catalyzed intrapolymer Heck reaction, the target copolymers LadP-SPE with high molecular weight (Mn = 47-50 kDa, Mw = 289-579 kDa) and different ion exchange capacity (IEC) values (1.04, 1.84 and 2.22 meq g-1, by titration) were prepared. By solution casting method, all the copolymers gave transparent and bendable membranes. The membrane with IEC = 2.22 meq g-1 exhibited high proton conductivity in wide range of relative humidity (RH) at 80 °C (ca. 1.6 mS cm-1 at 20% RH and 351.2 mS cm-1 at 95% RH). Moreover, the stiff ladder structure strengthened the molecular chain which contributed to the membrane with high IEC value and water uptake to have desirable mechanical stability up to 90% RH at 80 °C.

Original languageEnglish
Pages (from-to)152-155
Number of pages4
JournalPolymer
Volume77
DOIs
Publication statusPublished - 2015 Oct 23
Externally publishedYes

Keywords

  • Block copolymers
  • Conducting polymers
  • Membranes

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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