THE SYNTHESIS OF POLYN-(P-VINYLBENZYLIDENE)-T-BUTYLAMINE N-OXIDE! AND CHARACTERIZATIONS OF REACTION WITH NITROGEN-DIOXIDE

Polymer-supported spin trap, polyN-(p-vinylbenzylidene)-t-butylamine N-oxide! (polyPBN), was prepared by using p-chlorostyrene as a startin g material, followed by Grignard reaction, condensation with t-butylam ine, reduction, polymerization, and oxidation. The adsorption ability of NO2 by polyPBN was investigated in a closed-circulation system. Pol yPBN maintains its original NO2 adsorbing ability in the mixed gas of nitrogen and nitrogen dioxide saturated with water vapor even after re peated (5 times) use. However, when the gaseous phase is freed from wa ter, polyPBN exhibits less efficiency to adsorb NO2 and its adsorbing ability decreases gradually with the repeated use.