Novel aluminum complexes bearing 2-(aminomethylene)malonate ligands with high efficiency and controllability in ring-opening polymerization of ε-caprolactone

Chi Chi Chang, Yung Chi Chang, Wei Yi Lu, Yi Chun Lai, Kuo Hui Wu, Ya Fan Lin, Hsuan Ying Chen

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

A series of Al complexes bearing diethyl 2-((arylamino)methylene)malonate and diethyl 2-((alkylamino)methylene)malonate ligands (AMM ligands) were synthesized and their application in the ring-opening polymerization of ε-caprolactone was studied. All the Al complexes bearing AMM ligands exhibited higher catalytic activity (approximately 2.8–16.5 fold) than those Al complexes bearing ketiminate ligands did, except O iPr AlMe 2 (2 fold lower catalytic activity). In addition, Al complexes with steric hindrance or electron-withdrawing groups in the ligands revealed the greater catalytic activity, and the chelating effect reduced the reactivity of ring-opening polymerization.

Original languageEnglish
Pages (from-to)399-408
Number of pages10
JournalEuropean Polymer Journal
Volume115
DOIs
StatePublished - Jun 2019

Keywords

  • Aluminum complex
  • Ring-opening polymerization
  • ε-caprolactone

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