Catalytic Synthesis of Polyolefin Elastomer Using Unsymmetrical <i>α</i>-Diimine Nickel Catalyst<sup>★</sup>

Wang, Zihao; Chen, Min; Chen, Changle

doi:10.6023/a23040162

Acta Chimica Sinica

2023

DOI: 10.6023/a23040162

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Catalytic Synthesis of Polyolefin Elastomer Using Unsymmetrical α-Diimine Nickel Catalyst^★

Zihao Wang¹,

Min Chen²,

Changle Chen³

Abstract: Supporting information for this article is available free of charge via the Internet at http://sioc-journal.cn. Project supported by the National Natural Science Foundation of China (Nos. 52025031, U19B6001, U1904212). ★ 庆祝《化学学报》创刊 90 周年. 项目受国家自然科学基金(Nos. 52025031, U19B6001, U1904212)资助.

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2024

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Steric and temperature effects in unsymmetrical α‐diimine nickel‐catalyzed ethylene and 1‐octene polymerization

Shou,

Li,

Tian

et al. 2024

Applied Organom Chemis

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In this contribution, a series of unsymmetric α‐diimine nickel complexes are synthesized. One side of these nickel complexes is the 2,4‐dimethyl‐6‐diphenylmethylaniline unit, and the steric effects are tuned by changing another aniline unit. These nickel complexes have high catalytic activities in ethylene (>106 g mol−1 h−1) and 1‐octene (104–105 g mol−1 h−1) polymerization, generating high‐molecular‐weight polyolefins (Mn > 104 g mol−1) with tunable branching densities (59–91/1000C). Steric effects and polymerization temperature can significantly affect the catalytic performance of the catalyst. Most importantly, catalysts with different steric hindrances have different temperature sensitivity. In general, catalysts with larger steric hindrances are more sensitive to temperature. This may be due to the fact that the rotation of some chemical bonds is blocked at low temperatures due to the larger volume of the substituents, resulting in more significant temperature sensitivity.

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Steric and temperature effects in unsymmetrical α‐diimine nickel‐catalyzed ethylene and 1‐octene polymerization

Shou,

Li,

Tian

et al. 2024

Applied Organom Chemis

View full text Add to dashboard Cite

show abstract

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Catalytic Synthesis of Polyolefin Elastomer Using Unsymmetrical α-Diimine Nickel Catalyst^★

Cited by 1 publication

References 62 publications

Steric and temperature effects in unsymmetrical α‐diimine nickel‐catalyzed ethylene and 1‐octene polymerization

Steric and temperature effects in unsymmetrical α‐diimine nickel‐catalyzed ethylene and 1‐octene polymerization

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Catalytic Synthesis of Polyolefin Elastomer Using Unsymmetrical α-Diimine Nickel Catalyst★

Cited by 1 publication

References 62 publications

Steric and temperature effects in unsymmetrical α‐diimine nickel‐catalyzed ethylene and 1‐octene polymerization

Steric and temperature effects in unsymmetrical α‐diimine nickel‐catalyzed ethylene and 1‐octene polymerization

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Product

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Catalytic Synthesis of Polyolefin Elastomer Using Unsymmetrical α-Diimine Nickel Catalyst^★