Polyelectrolyte Behaviours of Poly-o-vinyl Benzoic Acid

Abstract

o-Vinyl benzoic acid (o-VBA) was synthesized and polymerized by using radical initiators, Poly-o-VBA (B) polymerized in a dilute aqueous sohltion of pH 7 showed different infrared absorption spectrum, solubility and potentiometric titration curve from those of poly-o-VBA (A) polymerized in benzene. From the results, it seems that the both polymers may have different stereoregulalities from each other. Furthermore, aqueous solution of P-o-VBA (B) showed a lower pH-value and a higher conductivity than those of poly-p-vinyl benzoic acid polymerized under the similar condition. This may be mainly attributed to a larger intrinsic ionizability of carboxyl groups of the o-polymer.