Cobalt-mediated catalytic chain-transfer polymerization (CCTP) in water and water/alcohol solution. Haddleton, D., M., Depaquis, E., Kelly, E., J., Kukulj, D., Morsley, S., R., Bon, S., A., Eason, M., D., & Steward, A., G. Journal of Polymer Science, Part A: Polymer Chemistry, 39(14):2378-2384, John Wiley & Sons, Inc., 2001.
Cobalt-mediated catalytic chain-transfer polymerization (CCTP) in water and water/alcohol solution [link]Website  abstract   bibtex   
This article describes the use of cobalt-mediated catalytic chain transfer in aqueous solution under fed conditions for the preparation of macromonomers of acidic, hydroxy, and zwitterionic functional monomers. Use of a batch reaction leads to hydrolysis of catalyst, a mixture of mechanisms and poor control of the reaction. A feed process is described that adds catalyst as a solution in monomer over the course of the reaction. The feed process is applied to a range of monomers of methacrylic acid (2), 2-aminoethyl methacrylate hydrochloride (3), 2-hydroxyethyl methacrylate (4), 2-methacryloxyethyl phosphoryl choline (5), glycerol monomethyl methacrylate (6), and 3-O-methacryloyl-1,2:5,6-di-O-isopropylidene-D-glucofuranose (7). Use of the feed process for water-soluble monomers in conjunction with 1 as a catalytic chain-transfer agent gives high-conversion, > 90%, water-soluble macromonomers. The number-average molecular mass (Mn was determined by integration of the 1H NMR spectrum comparing the vinylic end group with the remainder of the backbone. Pseudo-Mayo plots were constructed by measuring the Mn at high conversion as a function of [monomer]/[catalyst] to give observed chain-transfer constants of 1120, 958, and 1058 for 4, 6, and 2, respectively. All products were obtained as relatively high-solid, homogeneous, low-viscosity aqueous solutions.
@article{
 title = {Cobalt-mediated catalytic chain-transfer polymerization (CCTP) in water and water/alcohol solution},
 type = {article},
 year = {2001},
 identifiers = {[object Object]},
 keywords = {Catalytic chain transfer,Cobalt,Hydrophilic,Macromonomer,Methacrylate},
 pages = {2378-2384},
 volume = {39},
 websites = {http://onlinelibrary.wiley.com/doi/10.1002/pola.1214/full},
 publisher = {John Wiley & Sons, Inc.},
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 abstract = {This article describes the use of cobalt-mediated catalytic chain transfer in aqueous solution under fed conditions for the preparation of macromonomers of acidic, hydroxy, and zwitterionic functional monomers. Use of a batch reaction leads to hydrolysis of catalyst, a mixture of mechanisms and poor control of the reaction. A feed process is described that adds catalyst as a solution in monomer over the course of the reaction. The feed process is applied to a range of monomers of methacrylic acid (2), 2-aminoethyl methacrylate hydrochloride (3), 2-hydroxyethyl methacrylate (4), 2-methacryloxyethyl phosphoryl choline (5), glycerol monomethyl methacrylate (6), and 3-O-methacryloyl-1,2:5,6-di-O-isopropylidene-D-glucofuranose (7). Use of the feed process for water-soluble monomers in conjunction with 1 as a catalytic chain-transfer agent gives high-conversion, > 90%, water-soluble macromonomers. The number-average molecular mass (Mn was determined by integration of the 1H NMR spectrum comparing the vinylic end group with the remainder of the backbone. Pseudo-Mayo plots were constructed by measuring the Mn at high conversion as a function of [monomer]/[catalyst] to give observed chain-transfer constants of 1120, 958, and 1058 for 4, 6, and 2, respectively. All products were obtained as relatively high-solid, homogeneous, low-viscosity aqueous solutions.},
 bibtype = {article},
 author = {Haddleton, David M. and Depaquis, Estelle and Kelly, Elizabeth J. and Kukulj, Dax and Morsley, Stuart R. and Bon, Stefan A.F. and Eason, Michael D. and Steward, Andrew G.},
 journal = {Journal of Polymer Science, Part A: Polymer Chemistry},
 number = {14}
}
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