Abstract
The poly(phenylene)s containing multi-pendant phenyl were prepared by Ni-catalyzed reaction of 1,2-bis(4-chlorobenzoyl)-3,4,5,6-tetraphenylbenzene and 1,4-dichloro-2,5-dibenzoylbenzene. 1,4-Dichloro-2,5-dibenzoylbenzene is very reactive moiety to increase high molecular weight. These polymers without any ether linkages on polymer backbone were presumably stable against nucleophilic attack by hydrogen peroxide, hydroxide anion, and radical generated in PEMFC operation system. The phenyl rings on side chain were selectively sulfonated, but phenyl rings on main chain were deactivated by strong electron-withdrawing groups and steric hindrance. The structure of membranes was studied by 1H NMR spectroscopy and properties were measured by ion exchange capacity, water uptake, Fenton test and proton conductivity.
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