Efficient synthesis of polyethylene wax using 8-(arylimino)-5,6,7-trihydroquinoline SiO2-supported heterogeneous nickel catalysts

IF 4.1 2区化学 Q2 POLYMER SCIENCE

Polymer Pub Date : 2025-04-12 DOI:10.1016/j.polymer.2025.128367

Shan Xu, Hu Xu, Mengna Lei, Hu Xue, Pei Li, Chao Li, Ao Chen, Fuzhou Wang

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引用次数: 0

Abstract

In this contribution, a series of nickel complexes based on 8-(arylimino)-5,6,7-trihydroquinoline (Ni1-Ni4) were designed and synthesized. These complexes exhibited high activity of up to 9.0 ×10⁶ g·PE/mol Ni·h^-1 in ethylene polymerization on treatment with of Et₂AlCl and producing highly branched polyethylene wax (branching numbers range from 66 to 82/1000C). To further improve the performance of these nickel catalysts, the SiO₂-supported catalyst of Ni4 was prepared, which presented better performance compared to homogeneous systems. Especially, the heterogeneous catalysts could further improve activity of up to 16.2 × 10⁶ g·PE/mol Ni·h^-1, and thermal stability (activity of Ni4-Na@SiO₂ up to 9.0 × 10⁶ g·PE/mol Ni·h^-1 at 75 °C) through ionic anchoring strategy. The morphology of polyethylene wax obtained by supported catalyst was also controllable. This work may provide an efficient and practical method for preparing polyethylene wax using late-transition metal catalysts.

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来源期刊

Polymer 化学-高分子科学

CiteScore

7.90

自引率

8.70%

发文量

959

审稿时长

32 days

期刊介绍： Polymer is an interdisciplinary journal dedicated to publishing innovative and significant advances in Polymer Physics, Chemistry and Technology. We welcome submissions on polymer hybrids, nanocomposites, characterisation and self-assembly. Polymer also publishes work on the technological application of polymers in energy and optoelectronics. The main scope is covered but not limited to the following core areas: Polymer Materials Nanocomposites and hybrid nanomaterials Polymer blends, films, fibres, networks and porous materials Physical Characterization Characterisation, modelling and simulation* of molecular and materials properties in bulk, solution, and thin films Polymer Engineering Advanced multiscale processing methods Polymer Synthesis, Modification and Self-assembly Including designer polymer architectures, mechanisms and kinetics, and supramolecular polymerization Technological Applications Polymers for energy generation and storage Polymer membranes for separation technology Polymers for opto- and microelectronics.