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  • Articles  (2)
  • Polymer and Materials Science  (2)
  • Physics  (2)
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  • Articles  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    Polymerization of ∊-caprolactone using heterobimetallic lanthanocene complexes (1997)
    Weinheim : Wiley-Blackwell
    Macromolecular Rapid Communications 18 (1997), S. 809-815 
    Details
    ISSN: 1022-1336
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The chiral heterobimetallic complexes Li[Ln(η5 : η1-C5R41SiMe2NCH2CH2R2)2] (Ln = Y, Lu; C5R41 = C5Me4, C5H4, 3-C5H3 t Bu; R2 = OMe, NMe2; Me: methyl; tBu: tert-butyl) have been found to polymerize ∊-caprolactone to give a polymer of high molecular weight (M̄n 〈 20 000) and moderate polydispersity (M̄w/M̄n 〈 2.0). Failure to observe a correlation between monomer/initiator ratio and molecular weight suggests a polymerization mechanism different from a pseudo-anionic mechanism.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/marc.1997.030180909
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  • 2
    Electronic Resource
    Electronic Resource
    Syndiospecific polymerization of styrene using methylaluminoxane-activated bis(phenolato)titanium complexes (1998)
    Weinheim : Wiley-Blackwell
    Macromolecular Chemistry and Physics 199 (1998), S. 543-545 
    Details
    ISSN: 1022-1352
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Styrene was polymerized using a series of methylaluminoxane-activated bis(phenolato)titanium complexes of the type {(OC6H2-4-Me-6-tBu)2Z}Tix2 (X = Cl, OiPr, η5-C5Me5) to give syndiotactic polystyrene. Catalyst activity was found to depend on the nature of the bridging group Z, where Z = CH2, CH2CH2, S, S=O. Activity was found to be highest for Z = S.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
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