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Synthesis and characterisation of sulfonated polybenzimidazole: a highly conducting proton exchange polymer

✍ Scribed by Xavier Glipa; Mustapha El Haddad; Deborah J Jones; Jacques Rozière

Publisher
Elsevier Science
Year
1997
Tongue
English
Weight
480 KB
Volume
97
Category
Article
ISSN
0167-2738

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✦ Synopsis

Grafting of sulfonated aryl groups on to polybenzimidazole, PBI, leads to a proton conducting polymer. The synthetic route allows close control of the degree of sulfonation, and a range of samples have been prepared with degrees of 24 21 sulfonation up to 75% of the available sites. Sulfonation increases the conductivity from ca. 10 S cm in non-modified 22 21

PBI to . 10 S cm at room temperature for highly sulfonated samples. The dependence of the conductivity both on the degree of sulfonation and on the conditions of membrane preparation are discussed.

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