Citation: Qian Hu, Su-Yun Jie, Pierre Braunstein, Bo-Geng Li. Ring-opening Copolymerization of ε-Caprolactone and δ-Valerolactone Catalyzed by a 2,6-Bis(amino)phenol Zinc Complex[J]. Chinese Journal of Polymer Science, ;2020, 38(3): 240-247. doi: 10.1007/s10118-020-2347-4 shu

Ring-opening Copolymerization of ε-Caprolactone and δ-Valerolactone Catalyzed by a 2,6-Bis(amino)phenol Zinc Complex

a.
State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
b.
Université de Strasbourg, CNRS, CHIMIE UMR 7177, Laboratoire de Chimie de Coordination, 4 rue Blaise Pascal, 67081 Strasbourg Cedex, France

Corresponding author: Su-Yun Jie, jiesy@zju.edu.cn
Received Date: 28 May 2019
Revised Date: 6 August 2019
Available Online: 12 October 2019

In combination with methyllithium, a 2,6-bis(amino)phenol zinc complex 1 was used in the ring-opening polymerization of δ-valerolactone in the absence or presence of benzyl alcohol and showed high efficiency, mainly producing cyclic and linear polyvalerolactones, respectively. On the basis of homopolymerization, the ring-opening copolymerization of ε-caprolactone and δ-valerolactone was investigated. The P(CL-co-VL) random copolymers, PCL-b-PVL and PVL-b-PCL diblock copolymers, were prepared by varying the feeding strategy (premixing or sequential feeding). The copolymer composition was adjusted by varying the feeding ratio of two monomers. The structure and thermal properties of obtained polymers were characterized by GPC, ¹H-NMR, ¹³C-NMR, MALDI-TOF mass spectroscopy, and DSC, respectively.
- Zn complex,
- Copolymerization,
- Block copolymer,
- Random copolymer
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