Citation: Cui Ping YU, Li Fang ZHANG, Zhi Quan SHEN. Ring-opening Polymerization of ε-Caprolactone Using Lanthanide Tris(4-tert-butylphenolate)s as a Single-component Initiator[J]. Chinese Chemical Letters, ;2003, 14(10): 1021-1023. shu

Ring-opening Polymerization of ε-Caprolactone Using Lanthanide Tris(4-tert-butylphenolate)s as a Single-component Initiator

Institute of Polymer Science, Zhejiang University, Hangzhou 310027

Received Date: 11 October 2002

Fund Project: the Special Found for Major State Basic Research Project (Grant No.G1999064801) and the Committee of Science and Technology of Zhejiang Province.This work was supported by the National Natural Science Foundation of China.(Grant No.20174033 and 20254001)

The ring-opening polymerization of ε-caprolactone (CL) initiated by novel single lanthanide tris(4-tert-butylphenolate)s [Ln(OTBP)₃] is reported. Single-component La(OTBP)₃ can effectively prepare polycaprolactone (PCL) with over 90% yield and viscosity average molecular weight about 60×10³ under quite mild conditions:molar ratio of CL to initiator is 1000, 60℃, 2 h in toluene. Mechanism study indicates that the monomer inserts into the growing chain via the break of acyl-oxygen bond of CL.
- Lanthanide tris(4-tert-butylphenolate)s,
- ε-caprolactone,
- ring-opening polymerization
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