Free radical polymerization of acryloyl chloride (AC) was conducted in the following solvents: dichloroethane, ethyl acetate, tetrahydrofuran, dichloromethane, dioxane, and cyclohexane. However, poly(acryloyl chloride) with high molecular weights could be obtained only in solvent cyclohexane. The molecular weights of poly-(acryloyl chloride) could be measured through analogous poly(methyl acrylate). The reactivity ratios of AC ( M 1 ) with styrene (St) or vinyl acetate (VA) obtained by the extended Kelen-Tü dös method at 42ЊC with dicyclohexylperoxydicarbonate as initiator in dioxane were found to be AC-St (r 1 Å 0.09 { 0.1, r 2 Å 0.40 { 0.1) and AC-VA (r 1 Å 0.84 { 0.1, r 2 Å 0.03 { 0.1), respectively. The Q and e values of AC calculated from obtained r 1 and r 2 were 0.58 and 1.02.

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