Preparation of oxidatively stable cation-exchange membranes by the elimination of tertiary hydrogens

摘要: Abstract Model compounds and radiatively grafted membranes were prepared in order to study the effect of tertiary hydrogens on stability used oxidatively aggressive environments. Sulfonated isopropylbenzene, which contains a hydrogen, yielded substantial amounts degradation products when exposed strong oxidizing solution. t-butylbenzene, is identical sulfonated isopropylbenzene except that hydrogen replaced by methyl group, only minute same Styrene (contains hydrogen) α-methylstyrene (tertiary has been group) onto poly (tetrafluoroethylene) films form cationic membranes. The styrene-prepared membrane exhibited several times more weight loss during exposure an aging solution than did membrane. energy efficiencies styrene-grafted decreased rapidly less 60% after 60 or 80 cycles cycling test cell. 82.6% 83.0% for 700 showed no effects chemical this period.