By courtesy of:
Darryl D DesMarteau
US 5463005 1995
Also:
Novel perfluorinated ionomers and ionenes
JFC, 1995, 72, 203-8
For conductivity:
Proton Conductivity in Nafion® 117 and in a Novel BisE (perfl uoroalkyl)sulf onyl]im ide lonomer Membrane
J. J. Sumner, S. E. Creager,t J. J. Ma, and D. D. DesMarteau
J. Electrochem. Soc., 1998, Vol. 145, No. 1, 107-10