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

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发布日期 2014-06-26

DOI 10.1039/C4PY00701H

影响因子 5.582

作者

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

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摘要

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).

期刊推荐

New Journal of Chemistry

Russian Journal of Organic Chemistry

Journal of Peptide Science

Journal of Natural Medicines

Current Opinion in Solid State & Materials Science

Chemical Communications

Nature Medicine

Saudi Pharmaceutical Journal

Organic Process Research & Development

Journal of Saudi Chemical Society

来源期刊

Polymer Chemistry

CiteScore: 8.6

自引率: 7.3%

年发文量: 457

Polymer Chemistry welcomes submissions in all areas of polymer science that have a strong focus on macromolecular chemistry. Manuscripts may cover a broad range of fields, yet no direct application focus is required.

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

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