Non-bioaccumulative, environmentally preferable stabilizer architectures for the dispersion polymerization of MMA in supercritical CO2 |
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Authors: | Hullathy Subban Ganapathy Jun Ho Kim Won Soo Kim Min Hee Woo Min Young Lee Seung-Soo Hong Hyun Gyu Kim Euh Duck Jeong Kwon Taek Lim |
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Institution: | 1. Department of Imaging System Engineering, Pukyong National University, Busan, 608-739, South Korea 2. Department of Chemical Engineering, Pukyong National University, Busan, 608-739, South Korea 3. Korea Basic Science Institute, Busan Centre, Busan, 609-735, South Korea
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Abstract: | To overcome the environmental concerns associated with long-chain perfluorinated compounds, in this report, non-bioaccumulative, environmentally friendly stabilizer architectures based on short-chain fluorinated polymers have been designed for the dispersion polymerization of methyl methacrylate (MMA) in supercritical CO2. Random copolymers composed of 2-(diisopropylamino)ethyl methacrylate (DPAEMA) and 2,2,3,3,4,4,4-heptafluorobutyl methacrylate (FBMA) or 2,2,3,3,4,4,5,5-octafluoropentyl methacrylate were prepared with various comonomer ratios and utilized as stabilizers. It was found that the copolymers effectively stabilized PMMA latexes in CO2, leading to the formation of free-flowing, spherical PMMA particles. With increase in the concentration of the stabilizer poly(FBMA-co-DPAEMA) from 2% to 6% (w/w with respected to MMA), the particles diameter decreased from 3.02 to 1.0 μm. |
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