화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Chemical Engineering, Vol.30, No.5, 1153-1161, May, 2013
DOI10.1007/s11814-013-0019-6  Export Citation
Polymerization of vinyl pivalate in supercritical carbon dioxide and the saponification for the preparation of syndiotacticity-rich poly(vinyl alcohol)
Quang Long Pham1, Van Hoa Nguyen1, 2, Yuvaraj Haldorai1, and Jae-Jin Shim1, †
  • 1School of Chemical Engineering, Yeungnam University, 214-1, Dae-dong, Gyeongbuk 712-749, Korea
  • 2Department of Chemistry, Nha Trang University, 2 Nguyen Dinh Chieu, Nha Trang, Vietnam
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This paper reports a successful free-radical dispersion polymerization of vinyl pivalate in supercritical carbon dioxide using poly(1H,1H-dihydroperfluorooctyl acrylate) and dimethylsiloxane-g-pyrrolidone carboxylic acid (Monasil PCA) as stabilizers. In both cases, no spherical polymer particles were obtained, which might be due to the high solubility of poly(vinyl pivalate) (PVPi) in supercritical carbon dioxide. The effects of the reaction time, pressure, temperature, monomer loading, stabilizer concentration and initiator concentration on the polymer yield and molecular weight of PVPi were also investigated. In addition, the formation of poly(vinyl alcohol) via saponification of the resulting PVPi is described.
Keywords:Poly(vinyl pivalate);Poly(vinyl alcohol);Supercritical Carbon Dioxide;Dispersion Polymerization
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