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Synthesis of a novel block copolymer poly(ethylene oxide)-block-poly(4-vinylpyridine) by combination of anionic ring-opening and controllable free-radical polymerization

Authors

  • Guangqiang Lu,

    1. Department of Macromolecular Science, Fudan University, The Key Open Laboratory of Molecular Engineering of Polymer, State Education Ministry of China, Shanghai 200433, China
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  • Zhongfan Jia,

    1. Department of Macromolecular Science, Fudan University, The Key Open Laboratory of Molecular Engineering of Polymer, State Education Ministry of China, Shanghai 200433, China
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  • Wen Yi,

    1. Department of Macromolecular Science, Fudan University, The Key Open Laboratory of Molecular Engineering of Polymer, State Education Ministry of China, Shanghai 200433, China
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  • Junlian Huang

    Corresponding author
    1. Department of Macromolecular Science, Fudan University, The Key Open Laboratory of Molecular Engineering of Polymer, State Education Ministry of China, Shanghai 200433, China
    • Department of Macromolecular Science, Fudan University, The Key Open Laboratory of Molecular Engineering of Polymer, State Education Ministry of China, Shanghai 200433, China
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Abstract

The block copolymer poly(ethylene oxide)-b-poly(4-vinylpyridine) was synthesized by a combination of living anionic ring-opening polymerization and a controllable radical mechanism. The poly(ethylene oxide) prepolymer with the 2,2,6,6-tetramethylpiperidinyl-1-oxy end group (PEOT) was first obtained by anionic ring-opening polymerization of ethylene oxide with sodium 4-oxy-2,2,6,6-tetramethylpiperidinyl-1-oxy as the initiator in a homogeneous process. In the polymerization UV and electron spin resonance spectroscopy determined the 2,2,6,6-tetramethylpiperidinyl-1-oxy moiety was left intact. The copolymers were then obtained by radical polymerization of 4-vinylpyridine in the presence of PEOT. The polymerization showed a controllable radical mechanism. The desired block copolymers were characterized by gel permeation chromatography, Fourier transform infrared, and NMR spectroscopy in detail. © 2002 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 40: 4404–4409, 2002

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