Aromatic ionic monomer bearing perfluorosulfonate moiety and its polycondensation toward high performance superacid ionomers Articles uri icon

authors

  • DANYLIV, OLESIA
  • LOJOIU, CRISTINA
  • BARBIER, VALESSA
  • MART├ŹN, VINCENT
  • SANCHEZ, JEAN YVES

publication date

  • September 2016

start page

  • 43

end page

  • 50

volume

  • 189

International Standard Serial Number (ISSN)

  • 0022-1139

Electronic International Standard Serial Number (EISSN)

  • 1873-3328

abstract

  • Bottom-up synthesis of perfluorosulfonic acid ionomers based on the high performance backbone is rarely performed, due to the difficulty of obtaining ionic monomers of high purity. Such an approach, however, results in ionic polymers of well-defined chemical structure and ionic group distribution. Here copper-mediated synthesis of an ionic monomer bearing a perfluorosulfonate group and two polymerizable fluorine-sites was studied. Its synthesis and purification were investigated with accuracy to find the least time-consuming and the most technologically advantageous protocol (the overall yield of the monomer consisted 76%). The monomer was subjected to polycondensation with commercial nonionic monomers, and a series of ionomers of different ionic concentration (and thus ion exchange capacity, IEC) was obtained. The resultant ionomers demonstrated excellent film-forming properties. The obtained membranes were characterized by high glass transition temperature (>160 degrees C) and high proton conductivity (10(-2)-10(-1)S/cm at 60-90 degrees C and 95% relative humidity). Such results make these materials promising for use in fuel cells. (C) 2016 Elsevier B.V. All rights reserved.

keywords

  • perfluorosulfonic monomer; meta-polymerizable groups; copper-mediated coupling; aromatic superacid ionomer; polymer electrolyte; fuel cells; linear poly(arylene ether)s; membranes; morphology; nafion