REACTIVITY OF N-VINYL-N-METHYLACETAMIDE I N RADICAL COPOLYMERIZATION

Rates of monomer consumption in copolymerization to high conversions o f N-vinyl-N-methylacetamide with vinyl acetate and styrene in an inert solvent were measured using gas chromatography. Reactivity ratios of the monomers were determined: r(VMA) = 4.79 and r(VA) = 0.57; r(VMA) = 0.07 and r(St) = 19.25. Curves that describe the instantaneous compos ition of copolymer as a function of monomer composition were plotted. Parameters of the Alfrey-Price scheme were calculated for VMA: Q(VMA) = 0.062 and e(VMA) = -1.07. The magnitudes of Q(VMA) and e(VMA) derive d from experimental data agree well with those deduced on the basis of quantum-chemical correlations.