Abstract
A series of benzoic acid derivatives [2,4-di-NO 2 , 3,4-di-NO 2 , p-NO 2 , p-CF 3 , p-Cl, p-CH 3 , and p-H (unsubstituted)], in conjunction with zinc chloride (ZnCl 2 ), led to living cationic polymerization of isobutyl vinyl ether (IBVE) in toluene at 0°C. With p-CF 3 , p-Cl, p-H and p6CH 3 benzoic acids, though the M n values were larger than those calculated at the early stages of the polymerization,, they agreed with the calculated values at higher conversions. The molecular weight distributions of the polymers become broader as the acidity of the benzoic acids decreased
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