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-Tudos method at 42 degrees C with dicyclohexylperoxydicarbonate as initiator in dioxane were found to be AC-St (r(1) = 0.09 +/- 0.1, r(2) = 0.40 +/- 0.1) and AC-VA (r(1) = 0.84 +/- 0.1, r(2) = 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.