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Abstract
Abstract This paper describes radical copolymerization of 2-methylene-1, 3-dithiane (a six-membered cyclic ketene dithioacetal, 1) with styrene and methyl methacrylate (MMA), The copolymerization proceeded without ring-opening of 1 to produce copolymer having dithioacetal group. The structure of the copolymer was determined by 1H, 13C NMR, IR, and UV spectroscopies. Polymerizability of 1 was higher than that of styrene and MMA. Monomer reactivity ratios determined are r1 = 3.35 and r2 = 0.03 (M2 = styrene) or r1 = 4.12 and r2 = 0.08 (M2 = MMA). The refractive index values of the resulting copolymers were also measured.
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