COLL 240 |
| Iveta Bannister, Jonathan V. M. Weaver, and Steven P. Armes. Department of Chemistry, School of Life Sciences, University of Sussex, Falmer, Brighton, BN1 9QJ, United Kingdom |
| A new tertiary amine-functionalized, amide-based initiator was synthesized for the Atom Transfer Radical Polymerization of various hydrophilic methacrylates, including 2-hydroxyethyl methacrylate (HEMA), glycerol monomethacrylate (GMA) and 2-methacryloyloxy ethyl phosphorylcholine (MPC). Low degrees of polymerization of 20 to 50 were targeted and the terminal amine groups of these precursor polymers were then quaternized using 4-vinylbenzyl chloride. Characterization by GPC and 1H NMR spectroscopy confirmed that the resulting styrene-functionalized macromonomers were near-monodisperse and well-defined. These macromonomers were used as reactive stabilizers for the synthesis of new sterically-stabilized polystyrene latexes via either aqueous emulsion or alcoholic dispersion polymerization. Scanning electron microscopy, dynamic light scattering and disk centrifuge photosedimentometry studies confirmed that latexes with narrow size distributions were obtained in most cases. The presence of stabilizer was confirmed using either 1H NMR spectroscopy or FT-IR spectroscopy. Moreover, it was shown that the macromonomers were typically much more efficient stabilizers than the corresponding unquaternized precursors. |
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Posters: Fundamental Research in Surface and Colloid Chemistry
6:00 PM-8:00 PM, Monday, March 29, 2004 Disneyland -- North Exhibit Hall, Poster
Division of Colloid and Surface Chemistry |