Improvement in zinc complexes bearing Schiff base in ring-opening polymerization of ε-caprolactone: A five-membered ring system

Feng Jie Lai, Li Ling Chiu, Chieh Ling Lee, Wei Yi Lu, Yi Chun Lai, Shangwu Ding, Hsuan Ying Chen, Kuo Hui Wu

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

The ring-opening polymerizations of ε-caprolactone (CL) using 5- and 6-membered ring Zn complexes bearing Schiff base as catalysts were comparatively studied. The 5-membered ring Zn complexes exhibited a considerably higher polymerization rate than the 6-membered ring Zn complexes (2–12 fold for CL polymerization) did. X-ray data revealed that 5-membered ring L5-Ph 2Zn creates larger empty space around the Zn center than 6-membered ring L6-Bn 2Zn. This allows higher interaction between the initiator and Zn complex and easy CL coordination.

Original languageEnglish
Article number121812
JournalPolymer
Volume182
DOIs
StatePublished - 7 Nov 2019

Keywords

  • Ring-opening polymerization
  • Schiff base
  • Zinc complex
  • ε-Caprolactone

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