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Styrene-vinylferrocene random and block copolymers by TEMPO-mediated radical polymerization

DOI

33

Citations

0

References

1999

Year

Martin Baumert, J. Fröhlich, Markus Stieger, Holger Frey, Rolf Mülhaupt, Herbert Plenio
Macromolecular Rapid Communications

Abstract

TEMPO-mediated free radical polymerization was employed for homo- and copolymerization of vinylferrocene (Vfc). Homopolymerization of Vfc resulted in relatively narrow polydispersities (Mw/Mn = 1.24–1.8), however, molecular weights were limited to 4 800. Copolymerization with styrene afforded random copolymers with molecular weights (Mn) up to 10 000, narrow polydispersity (1.2 > Mw/Mn > 1.4) and up to 42 mol-% Vfc. Block copolymers with PS block and P(S-co-Vfc) block with molecular weights (Mn) in the range of 9 000 to 17 600 (Mw/Mn > 1.3) were also prepared with up to 17 mol-% vinylferrocene. DSC revealed two glass transition temperatures (Tg) evidencing phase separation.