Synthesis of branched and hyperbranched polystyrenes

Macromolecules

Volumn 29, Issue 3, 1996, Pages 1079-1081

  Gaynor, Scott G ^a   Edelman, Shane ^a   Matyjaszewski, Krzysztof ^a  

^a CARNEGIE MELLON UNIVERSITY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 3643082416     PISSN: 00249297     EISSN: None     Source Type: Journal    
DOI: 10.1021/ma9513877     Document Type: Article

References (17)

1. Tomalia, D. A.; Naylor, A. M.; Goddard, W. A., III. Angew. Chem., Int. Ed. Engl. 1990, 29, 138.
2. Frechet, J. M. J. Science 1994, 263, 1710.
3. Webster, O. W.; Kim, Y. H. J. Am. Chem. Soc. 1990, 112, 4592.
4. Webster, O. W.; Kim, Y. H. Macromolecules 1992, 25, 5561.
5. Webster, O. W.; Kim, Y. H. Polym. Prepr. (Am. Chem. Soc., Div. Polym. Chem.) 1988, 29, 310.
6. Frechet, J. M. J.; Hawker, C. J.; Lee, R. J. Am. Chem. Soc. 1991, 113, 4583.
7. Huit, A.; Malmstrom, E.; Johansson, M. J. Polym. Sci., Polym. Chem. Ed. 1993, 31, 619.
8. Mathias, L. J.; Carothers, T. W. J. Am. Chem. Soc. 1991, 113, 4043.
9. Suzuki, M.; Li, A.; Saegusa, T. Macromolecules 1992, 25, 7071.
10. Percec, V.; Kawasumi, M. Macromolecules 1992, 25, 3843.
11. Frechet, J. M. J.; Henmi, M.; Gitsov, I.; Aoshima, S.; Leduc, M.; Grubbs, R. B. Science 1995, 269, 1080.
12. Wang, J.-S.; Matyjaszewski, K. J. Am. Chem. Soc. 1995, 117, 5614.
13. Matyjaszewski, K.; Wang, J.-S. Macromolecules 1995, 28, 7901.
14. 1H NMR to determine molecular weight.
15. Copolymerizations of CMS and Styrene. The monomers were degassed prior to the reaction by bubbling argon through the monomer. The reactions were carried out in 50% (w/vol) solutions using p-dimethoxybenzene as the solvent. The ratio of styrene:CMS:Cu(I)Cl:bpy was 50:1:1: 3. The solids were placed in a flask with a rubber septum and magnetic stirrer and degassed three times by pulling a vacuum and back-filling with argon. Monomer was added via syringe. The appropriate amount of CMS was then added via syringe. The reaction was heated to 130 °C, and samples were removed at various times by syringe. The samples were evaluated by GC and GPC for conversion and molecular weights, respectively. The reaction was quenched by precipitation into methanol.
16. 3 technology.
17. Raff, R. A. V. In Ethylene and Its Industrial Derivatives; Miller, S. A., Ed.; Ernest Benn Limited; London, 1969; Chapter 9.1.