Quaternary Ammonium Polyelectrolytes. VI. Kinetic Studies on the Quaternization Reactions of Chloromethylated Polystyrene with 4,4′-Bipyridil and of Poly(4-Vinylpyridine) with Ethylchloroacetate

Abstract

Abstract Kinetic studies on the quaternization of chloromethylated polystyrene with 4,4′-bipyridil in dimethylsulfoxide and N,N-dimethylformamide, as well as on the quaternization of poly(4-vinylpyridine) with ethylchloroacetate in formamide, N,N-dimethylformamide, and methanol, were performed. For most solvents, kinetic studies of the reactions between model compounds, such as benzylchloride and 4-methylpyridine, with 4,4′-bipyridil and ethylchloroacetate, respectively, were also performed. Both the kinetic behaviors and the kinetic parameters were determined. Analytical and 1H-NMR methods were used, the latter only for the reaction of poly(4-vinylpyridine) and 4-methylpyridine with ethylchloroacetate in deuterated methanol. In the case of polymers, different kinetic behaviors were observed for the same quaternization reaction, depending on the nature of the solvent. Thus, the reaction of chloromethylated polystyrene with 4,4′-bipyridil in dimethylsulfoxide followed a normal second-order kinetics, while ...