Master of Chaos and Order: Opposite Microstructures of PCL-co-PGA-co-PLA Accessible by a Single Catalyst**

Ruth D. Rittinghaus, Johannes Zenner, Andrij Pich, Moshe Kol*, Sonja Herres-Pawlis*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

One catalyst, two reaction set-ups, three monomers and unlimited macromolecular microstructural designs: The iron guanidine complex [FeCl2(TMG5NMe2asme)] (1) polymerizes lactide faster than the industrially used Sn(Oct)2 and shows high activity towards glycolide and ϵ-caprolactone. Its distinguished features enable the synthesis of both block and random-like copolymers in the melt by a simple change of the polymerization set-up. Sequential addition of monomers yields highly ordered block copolymers including the symmetrical PLA-b-PGA-b-PCL-b-PGA-b-PLA pentablock copolymers, while polymerizations of monomer mixtures feature enhanced transesterifications and pave the way to di- and terpolymers with highly dispersed repeating unit distributions. A robust catalyst active under industrially applicable conditions and producing copolymers with desired microstructures is a major step towards biocompatible polymers with tailor-made properties as alternatives for traditional plastics on the way towards a sustainable, circular material flow.

Original languageEnglish
Article numbere202112853
JournalAngewandte Chemie - International Edition
Volume61
Issue number11
DOIs
StatePublished - 7 Mar 2022

Keywords

  • Block Copolymers
  • Caprolactone
  • Glycolide
  • Iron
  • Lactide
  • Random Copolymers

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