Homo- and copolymerizations of ethylene and α-olefins in n-hexane catalyzed by Ni(ii)-α-diimine catalyst

Yan, Xinhua; Fu, Zhifeng; Li, Yingqi; Shi, Yan

doi:10.1007/s00289-011-0540-x

Cited by 5 publications

(1 citation statement)

References 33 publications

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“…The reason is that chain walking will destroy the chain structure uniformity of the copolymerized products, and its branch length distribution is similar to that of the products obtained by catalyzing ethylene homopolymerization. Yan et al [ 164 ] used α‐diimide nickel (Ni) catalyst to catalyze the copolymerization of ethylene with 1‐hexene or 1‐octene and obtained a good amount of comonomer insertion (Table 3, No. 18).…”

Section: Post‐metallocene Catalyst For Ethylene/α‐olefin Solution Cop...mentioning

confidence: 99%

Progress in the catalyst for ethylene/α‐olefin copolymerization at high temperature

Liu

2023

Can J Chem Eng

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Ethylene/α‐olefin copolymers are one of the most widely‐used polyolefin materials. With the continuous improvement of polyolefin catalysts, high‐performance polyolefin materials were synthesized by adjusting the chain microstructure, changing the comonomer type and comonomer insertion amount, among which the ethylene/α‐olefin random copolymer elastomer (POE) and olefin block copolymer elastomer (OBC) are the most famous and well accepted by the market. The excellent properties of POE and OBC first depend on their polymer chain microstructure. The chain microstructure of polyolefins is fundamentally determined by the catalysts, polymerization conditions, comonomer feed policies, and reaction engineering. High‐performance ethylene/α‐olefin copolymer elastomers are currently prepared by high‐temperature solution polymerization process, which needs to be carried out at a temperature above the melting point of the polymer and is beneficial to speed up the polymerization reaction rate and control the polyolefin chain microstructure. However, the high‐temperature solution polymerization process launched more stringent requirements for the olefin coordination polymerization catalyst. Systematic reports on catalysts for high‐temperature solution copolymerization of ethylene and α‐olefins are lacking. In this review, we screened some catalysts suitable for the controllable copolymerization and high‐temperature solution copolymerization of ethylene/α‐olefin based on the catalyst's heat resistance, copolymerization activity, comonomer insertion ability, molecular weight, and distribution of the copolymer, including traditional Z–N catalysts, metallocene catalysts, and post‐metallocene catalysts. And the future development of catalysts for high‐temperature solution copolymerization of olefins, catalysts for precise control of polyolefin chain microstructures, and catalysts for olefin copolymerization with polar monomers at high temperature are envisaged.

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Section: Post‐metallocene Catalyst For Ethylene/α‐olefin Solution Cop...mentioning

confidence: 99%

Progress in the catalyst for ethylene/α‐olefin copolymerization at high temperature

Liu

2023

Can J Chem Eng

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Synthesis and application of α-diimine Ni(II) and Pd(II) complexes with bulky steric groups to polymerization of ethylene and methyl methacrylate

Tanaka

Liu

Nakayama

et al. 2015

Journal of Molecular Catalysis A: Chemical

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Study on ethylene/1-hexene copolymerization catalyzed by α-diimine nickel catalysts with different ligands

Xing

Wang

et al. 2021

Magnetic Resonance Letters

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Homo- and copolymerizations of ethylene and α-olefins in n-hexane catalyzed by Ni(ii)-α-diimine catalyst

Cited by 5 publications

References 33 publications

Progress in the catalyst for ethylene/α‐olefin copolymerization at high temperature

Progress in the catalyst for ethylene/α‐olefin copolymerization at high temperature

Synthesis and application of α-diimine Ni(II) and Pd(II) complexes with bulky steric groups to polymerization of ethylene and methyl methacrylate

Study on ethylene/1-hexene copolymerization catalyzed by α-diimine nickel catalysts with different ligands

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