Citation: Chen-Yang Hu, Ran-Long Duan, Jing-Wei Yang, Shu-Jun Dong, Zhi-Qiang Sun, Xuan Pang, Xian-Hong Wang, Xue-Si Chen. Enolic Schiff Base Zinc Amide Complexes: Highly Active Catalysts for Ring-Opening Polymerization of Lactide and ε-Caprolactone[J]. Chinese Journal of Polymer Science, ;2018, 36(10): 1123-1128. doi: 10.1007/s10118-018-2129-4 shu

Enolic Schiff Base Zinc Amide Complexes: Highly Active Catalysts for Ring-Opening Polymerization of Lactide and ε-Caprolactone

a.
Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
b.
University of Chinese Academy of Sciences, Beijing 100049, China
c.
Department of Materials Science and Engineering, Jilin University, Changchun 130025, China
d.
VIP Department, Stomatological Hospital of Jilin University, Changchun 130021, China

Corresponding author: Xuan Pang, xpang@ciac.ac.cn (X.P.) Xue-Si Chen, xschen@ciac.ac.cn (X.S.C.)
Received Date: 23 January 2018
Accepted Date: 13 February 2018
Available Online: 16 April 2018

A series of zinc silylamido complexes based upon NNO tridentate enolic Schiff base framework have been synthesized and characterized. These complexes were tested for the ring opening polymerization of lactide and ε-caprolactone, exhibiting notably high activity at ambient temperature. The influence of imine bridge length and substituents of diketone over the course of polymerization was investigated in details. Remarkably, 4a was confirmed to be a rare example of exceedingly active and robust zinc catalysts, achieving major transformation of lactide under extremely low loading (0.025 mol%) within 18 min. The influence of various monomers as well as the polymerization mechanism have also been discussed.
- Zinc,
- β-Diketone,
- Ring-opening polymerization,
- Lactide,
- ε-Caprolactone
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