Influence of lactic acid on the catalytic performance of MDABCO for ring-opening polymerization of L-lactide

Zhixiong Luo, Somboon Chaemchuen, Kui Zhou, Andres Alvarado Gonzalez, Francis Verpoort

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

A series of metal organic frameworks (MOFs) MDABCO (M = Co, Ni, Cu, Zn; DABCO = 1,4-diazabicyclo[2.2.2]octane) are utilized as catalysts for the bulk ring-opening polymerization of L-lactide. The catalytic activity varies in the order CuDABCO, NiDABCO < ZnDABCO, CoDABCO. By adding lactic acid, we unexpectedly observed enhanced catalytic activity. The combined use of lactic acid and ZnDABCO during polymerization results in a highly active polymerization system, along with the gradual change of MOFs structure caused by an increased acid concentration. Compared to related homogeneous fragments, such as zinc nitrate and 1,4-diazabicyclo[2.2.2]octane, ZnDABCO is found to afford highly isotactic polylactide, which would be ascribed to the unique structural properties of MOFs.

Original languageEnglish
Pages (from-to)15-21
Number of pages7
JournalApplied Catalysis A: General
Volume546
DOIs
Publication statusPublished - 25 Sep 2017

Keywords

  • Heterogeneous catalysis
  • Lactic acid
  • MDABCO MOFs
  • Polylactide
  • Ring-opening polymerization

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology

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