Sulfonated polynaphthalimides with benzimidazole pendant groups

Yolanda Álvarez-Gallego*, Bastian Ruffmann, Vasco Silva, Hugo Silva, Angel E. Lozano, José G. de la Campa, Suzana Pereira Nunes, Javier de Abajo

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

41 Scopus citations


A series of new polyimides bearing simultaneously sulfonic acid groups and benzimidazole rings in different proportions have been synthesised by one pot high temperature polycondensation. The composition of the copolymers, as well as the distribution of the ionic sites along the polymer chain, has been changed systematically in order to study their relation with polymer properties. The incorporation of sulfonic side groups in the structure improves the solubility in polar organic solvents. In turn, the presence of sulfonic acid moieties impairs thermal resistance. Membranes based on the synthesised polyimides were prepared by solution casting and their water uptake as well as proton conductivity were determined.

Original languageEnglish (US)
Pages (from-to)3875-3883
Number of pages9
Issue number18
StatePublished - Aug 26 2008

Bibliographical note

Funding Information:
Financial support provided by the ‘‘HGF-Strategiefonds'’ project ‘‘Membranes and Electrodes for DMFC'’ (Germany) and the Spanish Ministry of Education and Science (MAT2007-62392) is gratefully acknowledged.


  • Benzimidazole
  • Ion-exchange membranes
  • Sulfonated polyimides

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry


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