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Methyl Methacylate/Vinyl Acetate/Toluene 라디칼공중합계에 대한 속도론적 연구
마영대,원유찬 단국대학교 1997 論文集 Vol.31 No.-
The free-radical copolymerization of methy methacrylate and vinyl acetate at 40℃ in toluene was examined by the steady-state polymerization. The following results were obtained: The copolyemr composition confirms the terminal model. The reactivity ratios of this system agree with those of the bulk system within the experiment error, which means that the solvent had very little effect on the copolymer composition of this system. Velocity-of-copolymerization data were interpreted on the basis of the current notions that the penultimate unit effect with respect to absolute values of propagation rate constant (but not with respect to the monomer reactivity ratios) is a general rule and the termination step is well represented by the penultimate model with the geometric mean approximaton. By using these models, a new equation was derivied, which was found to describe experimental data well.