Catalytic synthesis of polyethylene-block-polynorbornene copolymers using a living polymerization nickel catalyst

文献情報

出版日 2014-06-26

DOI 10.1039/C4PY00701H

インパクトファクター 5.582

著者

Haiyang Gao, Yong Liu, Guiliang Li, Zefan Xiao, Guodong Liang, Qing Wu

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要旨

Polyethylene-block-polynorbornene (PE-b-PNB) copolymers were synthesized using an amine–imine nickel catalyst by sequential monomer addition in a living fashion. Norbornene homopolymerizations catalyzed by amine–imine nickel catalyst were firstly evaluated and high-molecular-weight polynorbornenes (PNBs) with polydispersities of 1.9–3.0 were produced. Introduction of the PE building block can significantly slow down the insertion rate of the norbornene monomer to afford a low-molecular-weight PNB block. Well-defined PE-b-PNB block copolymers (Mw/Mn < 1.16) were prepared by combination of living polymerization of ethylene for 15 min and sequential polymerization of norbornene. The block copolymer architecture was studied and confirmed by FT-IR, NMR, DSC, and transmission electron microscopy (TEM).

掲載誌

Polymer Chemistry

CiteScore: 8.6

自己引用率: 7.3%

年間論文数: 457

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Catalytic synthesis of polyethylene-block-polynorbornene copolymers using a living polymerization nickel catalyst

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