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