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D. Jamanek, Z. Wieczorek, I. Leszczyńska, W. Skupiński

Hydrogenation of C=C bonds in styrene-butadiene-styrene block copolymers

in the presence of monocyclopentadienyl titanium(IV) catalytic systems (in English)

Polimery 2011, No 4, 289


DOI: dx.doi.org/10.14314/polimery.2011.289


Summary

Hydrogenation of C=C bonds in styrene-butadiene-styrene (SBS) block copolymers in the presence of CpTiCl2(OC6H4Y-p)/BuLi and CpTiCl2(OC6H4Y-p)/Et3Al catalytic systems (Cp = cyclopentadienyl, Bu = butyl, Et = ethyl, Y = NO2, Cl, H, CH3, OCH3) was investigated. The effect of the kind of metal alkyl, Li:Ti or Al:Ti molar ratio, copolymer composition, reaction temperature and hydrogen pressure on activity of catalytic system was investigated. The best degree of hydrogenation for SBS copolymers (80—90 %), was obtained for the systems containing p-chlorophenoxy ligand with the most electron-acceptor properties.


Key words: styrene-butadiene-styrene copolymer, cyclopentadienyl titanium complexes, hydrogenation, buthyllithium, triethylaluminum

e-mail: Wincenty.Skupinski@ichp.pl

D. Jamanek, Z. Wieczorek, I. Leszczyńska, W. Skupiński (88.2 KB)
Hydrogenation of C=C bonds in styrene-butadiene-styrene block copolymers in the presence of monocyclopentadienyl titanium(IV) catalytic systems (in English)