Chinese Journal of Polymer Science

, Volume 38, Issue 3, pp 240–247 | Cite as

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

  • Qian Hu
  • Su-Yun JieEmail author
  • Pierre Braunstein
  • Bo-Geng Li


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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This work was financially supported by the National Key R&D Program of China (No. 2016YFC1100801) and the State Key Laboratory of Chemical Engineering (No. SKL-ChE-18D01).


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Copyright information

© Chinese Chemical Society Institute of Chemistry, Chinese Academy of Sciences Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Qian Hu
    • 1
  • Su-Yun Jie
    • 1
    Email author
  • Pierre Braunstein
    • 2
  • Bo-Geng Li
    • 1
  1. 1.State Key Laboratory of Chemical Engineering, College of Chemical and Biological EngineeringZhejiang UniversityHangzhouChina
  2. 2.Université de Strasbourg, CNRS, CHIMIE UMR 7177, Laboratoire de Chimie de CoordinationStrasbourg CedexFrance

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