The influence of the nature of the catalytic system on zirconocene-catalyzed polymerization of alkyl methacrylates

Giorgos Karanikolopoulos, Christos Batis, Marinos Pitsikalis, Nikolaos Hadjichristidis*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

33 Scopus citations

Abstract

Three non-bridged dimethylzirconocene complexes; i.e., bis(η5-cyclopentadienyl)dimethylzirconium (1), bis(η5-tert-butyl-cyclopentadienyl)dimethylzirconium (2), bis(η5-indenyl)dimethylzirconium (3), and the chiral zirconocene rac-ethylenebis(η5-indenyl)dimethylzirconium (4) were synthesized and used as catalysts for the polymerization of methyl methacrylate, MMA, combined with tris(pentafluorophenyl)borate (A) or tetrakis(pentafluorophenyl)borate dimethylanilinum salt (B) in the presence of ZnEt2. The evolution of the polymerization characteristics; i.e., molecular weight, molecular-weight distribution, and yield were examined for the above systems. The influence of the nature of the solvent was also investigated. The aggregation behavior, the steric hindrance, and the lipophilicity of the active catalytic systems are the most important parameters determining the polymerization characteristics. The tacticity of the products is reported and the influence of the catalyst structure is discussed. Finally, the polymerization of other methacrylates (alkyl = butyl, hexyl, decyl, stearyl, and sec-butyl), was conducted and the effect of the nature of the alkyl ester group on the molecular and structural characteristics was established.

Original languageEnglish (US)
Pages (from-to)831-840
Number of pages10
JournalMacromolecular Chemistry and Physics
Volume204
Issue number5-6
StatePublished - Apr 17 2003

Keywords

  • Catalysts
  • Kinetics (polym.)
  • Metallocene catalysts
  • Polyesters

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Polymers and Plastics
  • Organic Chemistry
  • Materials Chemistry

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