Copolymerizabilities of methyl vinyl ketone(M
1) with acrylamide(M
2) without catalyst were studied in tetrahydrofuran below room temperature.
Under several conditions of light, the monom er reactivity ratios were obtained as follows; r
1=0.70 and r
2=0.79 for irradiation under room light; r
1 =O.78 and r
2=0.97 for unirradiation under light; r
1=1.28 and r
2=1.23 for irradiation under UV light. The presence of oxygen gas in the copolymerization system tends to decrease the rate of copolymerization(R
p). Meanwhile, it is interesting that R
p in unirradiated systems indicated higher value than these in the irradiated system with room light or UV light. These R
p indicated the maximum values at about 50 mol% in monomer feed, and the each monomer was not homopolymerized. These phenomena might be explained by the interaction between carbonyl group and carbamoyl group.
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