Synthesis of polystyrene star-shaped polymers based on w-undecenyl polystyrene macromonomers and octafunctionalsilsesquioxanes

POLY 178

Pierre J. Lutz, lutz@ics.u-strasbg.fr, Institut Charles Sadron (CNRS), 6 rue Boussingault, F-67083 Strasbourg, France, Hassan Harris, Harris@ics.u-strasbg.fr, Macromolecular Engineering, institut charles sadron (ICS), 6 rue Boussingault, Strasbourg, F-67083, France, and Edgar Catari, ecatari@ivic.ve, Laboratory of Polymer, IVIC, Altos de Pipe. Edo. Miranda. Venezuela, Center of Chemical. Venezuelan Institute of Scientific Researches (IVIC), Carretera panamericana Km. 11. Edo. Miranda, Altos de Pipe, 21827, Venezuela.
Well-defined octafunctional polystyrene star-shaped polymers were prepared by reacting w-undecenyl polystyrene macromonomers with silsesquioxanes. The synthesis of macromonomers made use of an omega-living polystyrene which is deactivated by 11-bromo-1-undecene. The coupling reaction was achieved via hydrosilylation between the Si-H functions of octafunctionalsilsesquioxane, and the double bond of the polystyrene macromonomer in the presence of a platinum catalyst. The precursor macromonomers and the resulting star-shaped polymers were characterized by 1H NMR, IR, SEC with RI detection and by SEC online light scattering to access molar mass and functionality. The octafunctional character of the star-shaped polystyrenes was confirmed unambiguously by SEC online light scattering.
 

General Papers: Synthesis and Characterization
6:00 PM-8:00 PM, Sunday, 10 September 2006 Moscone Center -- Hall D, Poster

Division of Polymer Chemistry

The 232nd ACS National Meeting, San Francisco, CA, September 10-14, 2006