Abstract
The interaction of poly(2-vinylpyridine 1-oxide) with mercuric chloride forms a stable chelate with mercuric ions in contrast to the monomer analogue 2-methylpyridine 1-oxide. Conductivity and u.v. measurements showed that chloride ions are not involved in the chelate formation and that the molar ratio of Hg 2+ to the oxide is 1 to 2 in excess mercuric chloride. Viscosity measurements suggest that the chelate is a polyelectrolyte and is formed in both neutral and acid solution. 0.2% HgCl 2 causes a remarkable drop in the viscosity of 0.4% polymer solution whereas a similar concentration of CaCl 2 has no effect. Temperature change from 27–45°C has little effect on the stability of the chelate. The possible use of this polymer for removing mercuric ions from aqueous solution is discussed.
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