Determination of Molecular Weight of Polyvinyl Acetate by Emulsion Polymerization

유화중합에 의한 폴리작산비닐의 분자양측정에 관한 연구

Polyvinyl acetate obtained by emulsion polymerization was fractioned by Baker and William's type column fraction method and the results of fraction were discussed. Acetone-water mixture was used as the solvent and sea sand (15∼20mesh) as the column carrier. Ne number average molecular weights(Mn) of fraction were determined by osmotic pressure method at 37℃ and weight average molecular weights(Mw) were determined by light setting method at 25℃ The intrinsic viscosity measurements were taken at various temperatures and the following equations were obtained fractionated PVAc in acetone solution at various temperature. 〔η〕=5.93×10-4Mn0.62 (30℃, Acetone) 〔η〕=3.66×10-4Mn0.65 (37℃, Acetone) 〔η〕=5.22×10-4Mn0.61 (30℃, Acetone)