Design of Effective Systems for Controlled Radical Polymerization of Styrene: Application of 4,4'-Dimethyl and 5,5' Dimethyl 2,2'-Bipyridine Copper(II) Complexes
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Schubert, Ulrich S.; Hochwimmer, Georg; Spindler, Christian E.; Nuyken, Oskar
- Abstract:
- [Cu(II)(4,49-dimethyl-2,29-bipyridine)3](PF6)2 (2) and [Cu(II) (5,59-dimethyl-2,29-bipyridine)
3](PF6)2 (4) were used together with aluminium isopropoxide and (1-bromoethyl)benzene in the controlled
radical polymerization of styrene resulting in polystyrenes with predetermined molecular weight and narrow
molecular weight distribution. The received polymers are colorless with a content of copper lower than
210 ppm. The substitution pattern at the bipyridine ligands has a distinct influence on the polymerization.
The rate of polymerization of styrene using 2/[(CH3)2CHO]3Al/C6H5CH(CH3)Br is two times larger than utilizing
4/[(CH3)2CHO]3Al/C6H5CH(CH3)Br.
- Year:
- 1999
- Type of Publication:
- Article
- Journal:
- Macromolecular Rapid Communications
- Volume:
- 20
- Pages:
- 351 – 355