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Received November 1, 2013
Accepted January 24, 2014
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Controlled radical polymerization of vinyl acetate in supercritical CO2 catalyzed by CuBr/terpyridine
Mohammad Tariqul Islam1
Yuvaraj Haldorai1
Van Hoa Nguyen1 2
Muhammad Naoshad Islam1 3
Choon Sup Ra4 3
Jae-Jin Shim1 3†
1School of Chemical Engineering, Yeungnam University, Gyeongsan, Gyeongbuk 712-749, Korea 2Department of Chemistry, Nha Trang University, 2 Nguyen Dinh Chieu, Nha Trang, Vietnam 3, Korea 4Department of Chemistry, Yeungnam University, Gyeongsan, Gyeongbuk 712-749, Korea
Korean Journal of Chemical Engineering, June 2014, 31(6), 1088-1094(7), 10.1007/s11814-014-0031-5
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Abstract
Poly(vinyl acetate) (PVAc) was synthesized by the atom transfer radical polymerization of vinyl acetate (VAc) in supercritical carbon dioxide using CuBr/2,2':6',2''-terpyridine complex as a catalyst and ethyl 2-bromoisobutyrate as an initiator. Polymerization proceeded in a controlled manner, and low to moderate conversion was achieved within a reasonable time. The effects of the monomer amount, temperature, pressure, initiator, and ligand loading on monomer conversion, molecular weight and molecular weight distribution of the polymer were examined._x000D_
The reaction kinetics was also investigated. The polymerization reaction was found to be first-order with respect to the monomer concentration. The molecular weights of the resulting PVAc increased linearly with increasing VAc conversion.
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References
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Park JY, Shim JJ, J. Supercrit. Fluids, 27(3), 297 (2003)
Woods HM, Silva MMCG, Nouvel C, Shakesheff KM, Howdle SM, J. Mater. Chem., 14, 1663 (2004)
Cooper AI, J. Mater. Chem., 10, 207 (2000)
Canelas DA, DeSimone JM, Adv. Polym. Sci., 133, 103 (1997)
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Beuermann S, Buback M, Schmaltz C, Kuchta FD, Macromol. Chem. Phys., 199, 1209 (1998)
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Ober CK, Hair ML, J. Polym. Sci., 25, 1395 (1987)
Zetterlund PB, Aldabbagh F, Okubo M, J. Polym. Sci. A: Polym. Chem., 47(15), 3711 (2009)
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Buback M, Morick J, Macromol. Chem. Phys., 211, 2154 (2010)
Seeliger F, Matyjaszewski K, Macromolecules, 42(16), 6050 (2009)
Breeze SR, Wang SN, Greedan JE, Raju NP, Inorg. Chem., 35(24), 6944 (1996)
