wherein the degree of {HEAD ~ sulfonation} of {TAIL ~ the sulfonated poly} provides an ion exchange capacity of 1.5 1.9 meq/g and a resistivity less than 1.2 Ω/cm2 
of
wherein the degree of { HEAD ~ sulfonation } of { TAIL ~ the sulfonated poly } provides an ion exchange capacity of 1.5 1.9 meq / g and a resistivity less than 1.2 Ω / cm2
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH