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http://dx.doi.org/10.7464/ksct.2010.16.2.073

Synthesis of Poly(vinyl acetate) Using Supercritical Carbon Dioxide and Subsequent Preparation of Poly(vinyl alcohol)  

Choe, Woo-Hyuk (School of Display and Chemical Engineering, Yeungnam University)
Pham, Quang Long (School of Display and Chemical Engineering, Yeungnam University)
Shim, Jae-Jin (School of Display and Chemical Engineering, Yeungnam University)
Publication Information
Clean Technology / v.16, no.2, 2010 , pp. 73-79 More about this Journal
Abstract
Vinyl acetate(VAc) was dispersion-polymerized using supercritical carbon dioxide that has many environmental advantages. To get poly(vinyl acetate) (PVAc) of larger molecular weights from conventional emulsion polymerization, VAc was polymerized at temperatures between 333.15 and 343.15 K and pressures between 20 and 40 MPa with initiator (0.5 ~ 5% of monomer) and silicone-based stabilizer (1 ~ 10% of monomer) for 2 ~ 50 hr. The resulting PVAc was analyzed to see the variations in the yield and the molecular weight. The final product of this research, PVA (poly(vinyl alcohol)), was prepared from PVAc by saponification. The effect of saponification conditions on the yield and the molecular weight of polymer were also studied.
Keywords
Supercritical carbon dioxide; Poly(vinyl acetate); Poly(vinyl alcohol); Dispersion polymerization; Stabilizer; Saponification;
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