Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/75215
Type: Artigo de periódico
Title: Stereoselective polymerization of butadiene by a new dicationic nickel complex
Author: Gerbase, AE
deSouza, RF
Vichi, EJD
daCunha, FV
Abstract: The new dicationic nickel complex [dppfNi(MeCN)(4)[BF4](2) (dppf = 1,1'-bis(diphenylphosphino)ferrocene) in the presence of diethylaluminium chloride (AlEt(2)Cl) exhibited high activity on the 1,3-butadiene polymerization. Reaction time, temperature and aluminium/nickel molar ratio were optimized in order to achieve maximum activity and selectivity. Conversions higher than 90% were obtained in contrast to other nickel-based systems using phosphine ligands, the resulting polybutadiene showed high cis-1,4 (>80%) content and only small amount of 1,2-units (2%). All polymers presented low molecular weights (M(w) < 11800).
Country: Suíça
Editor: Huthig & Wepf Verlag
Rights: fechado
Identifier DOI: 10.1002/apmc.1996.052390104
Date Issue: 1996
Appears in Collections:Unicamp - Artigos e Outros Documentos

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