Ring-opening polymerization of lactones using zirconocene catalytic systems: Block copolymerization with methyl methacrylate

Konstantinos Kostakis, Stylianos Mourmouris, Giorgos Karanikolopoulos, Marinos Pitsikalis, Nikolaos Hadjichristidis*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

28 Scopus citations

Abstract

The ring-opening polymerization of ε-caprolactone (ε-CL) and δ-valerolactone (δ-VL) using nine catalytic systems consisting of a combination of three C2V zirconocene complexes and three borate cocatalysts is discussed. The polymerizations proceed in a well-controlled manner, producing polymers with relatively high molecular weights and narrow molecular weight distributions. Kinetic experiments of the polymerization of ε-CL with the catalytic system Cp2ZrMe2/B(C 6F5)3 (1) showed a linear dependence between polymerization yield and molecular weight with time, as well as between the molecular weight with the molar ratio of the monomer over the catalyst [e-CL]/[Zr], indicating sufficient control of the polymerization reaction. The catalytic system (1) was utilized for the synthesis of well-defined block copolymers of MMA with ε-CL and δ-VL. All samples were characterized by size exclusion chroma-tography, nuclear magnetic resonance, and differential scanning calorimetry.

Original languageEnglish (US)
Pages (from-to)3524-3537
Number of pages14
JournalJournal of Polymer Science, Part A: Polymer Chemistry
Volume45
Issue number16
DOIs
StatePublished - Aug 15 2007

Keywords

  • Block copolymers
  • Catalysis
  • Differential scanning calorimetry
  • Polyesters
  • Ring-opening polymerization
  • Size exclusion chromatography

ASJC Scopus subject areas

  • Polymers and Plastics
  • Organic Chemistry
  • Materials Chemistry

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