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Catalytic Polymerization of Butadiene in Aqueous Systems with Cationic Nickel(II) Complexes

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2008

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Berkefeld, Andreas
Ahlmann, Martin

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http://nbn-resolving.de/urn:nbn:de:bsz:352-opus-73567
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https://doi.org/10.1021/ma8016579
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Attribution-NonCommercial-NoDerivs 2.0 Generic

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Macromolecules. 2008, 41(22), pp. 8332-8338. ISSN 0024-9297. eISSN 1520-5835. Available under: doi: 10.1021/ma8016579

Zusammenfassung

The cationic nickel(II) complexes [(η3-C3H5)Ni(SbPh3)2][B(3,5-(CF3)2C6H3)4] (2) and [(η3-C3H5)Ni(SbPh3)2][Al(OC(CF3)3)4] (3) were prepared and their polymerization activities in aqueous systems were compared with [(η3-C3H5)Ni(η6-BHT)][B(3,5-(CF3)2C6H3)4] (1) (BHT = 3,5-di-tert-butyl-4-hydroxytoluene). Cis-polybutadiene is formed in nonaqueous solution polymerization. The presence of water decreases activity and polymer molecular weight and increases trans incorporation of butadiene units. In emulsion polymerization, stable polymer dispersions can be obtained with complex 2 and 3, respectively. The microstructure is strongly altered by comparison to nonaqueous polymerization. Trans-polybutadiene is formed with activities of up to 1.5 × 103 mol (butadiene) mol (Ni)−1 h−1. The semicrystalline latex particles have sizes of ca. 200 nm, with a monoclinic structure.

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540 Chemie

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ISO 690KORTHALS, Brigitte, Andreas BERKEFELD, Martin AHLMANN, Stefan MECKING, 2008. Catalytic Polymerization of Butadiene in Aqueous Systems with Cationic Nickel(II) Complexes. In: Macromolecules. 2008, 41(22), pp. 8332-8338. ISSN 0024-9297. eISSN 1520-5835. Available under: doi: 10.1021/ma8016579
BibTex
@article{Korthals2008Catal-9824,
  year={2008},
  doi={10.1021/ma8016579},
  title={Catalytic Polymerization of Butadiene in Aqueous Systems with Cationic Nickel(II) Complexes},
  number={22},
  volume={41},
  issn={0024-9297},
  journal={Macromolecules},
  pages={8332--8338},
  author={Korthals, Brigitte and Berkefeld, Andreas and Ahlmann, Martin and Mecking, Stefan}
}
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    <dcterms:abstract xml:lang="eng">The cationic nickel(II) complexes [(η3-C3H5)Ni(SbPh3)2][B(3,5-(CF3)2C6H3)4] (2) and [(η3-C3H5)Ni(SbPh3)2][Al(OC(CF3)3)4] (3) were prepared and their polymerization activities in aqueous systems were compared with [(η3-C3H5)Ni(η6-BHT)][B(3,5-(CF3)2C6H3)4] (1) (BHT = 3,5-di-tert-butyl-4-hydroxytoluene). Cis-polybutadiene is formed in nonaqueous solution polymerization. The presence of water decreases activity and polymer molecular weight and increases trans incorporation of butadiene units. In emulsion polymerization, stable polymer dispersions can be obtained with complex 2 and 3, respectively. The microstructure is strongly altered by comparison to nonaqueous polymerization. Trans-polybutadiene is formed with activities of up to 1.5 × 103 mol (butadiene) mol (Ni)−1 h−1. The semicrystalline latex particles have sizes of ca. 200 nm, with a monoclinic structure.</dcterms:abstract>
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