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Synthesis of Ultrahigh-Molecular-Weight Polyethylene with [OSNO]-type Bis(phenolate) Titanium Complexes

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Abstract

The catalytic activity of seven titanium complexes with a [OSNO]-type bis(phenolate) ligand in ethylene polymerization has been studied at mild conditions of ethylene pressure (1.2 atm) and room temperature. It has been shown that in the presence of methylaluminoxane or triisobutyl aluminum modified methylaluminoxane cocatalyst, the activities of the titanium catalytic systems reach 86 kg PE/((mol catalyst) h) and lead to the preparation of ultrahigh-molecular-weight polyethylene. [OSNO]-type bis(phenolate) ligand structures have a great influence on the structure and molecular weight of polyethylene. The resulted polyethylenes are low long-chain branched polyethylene (n ≥ 6) or linear polyethylene and the melting temperatures of these polyethylenes are about 128–133°C.

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Funding

This work is supported by “Anhui Province Key Laboratory of Environment-friendly Polymer Materials”, High-level Scientific Research Foundation for the Introduction of Talent (no. 2020rcjj27), University Natural Science Research Project of Anhui Province (no. KJ2021A0918) and the Key Projects for the Excellent Talent Foundation of Education Department of Anhui Province (gxyqZD2020039).

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Authors and Affiliations

  1. Anhui Engineering Laboratory for Medicinal and Food Homologous Natural Resources Exploration, College of Chemistry and Chemical Engineering, Hefei Normal University, 230601, Hefei, Anhui, China

    Qihua Zhou, Shuqi Fang, Na Li, Xiangyu Cao, Shuangyi Fan & Xiaoyan Wang

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  1. Qihua Zhou
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  2. Shuqi Fang
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  3. Na Li
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Correspondence to Qihua Zhou.

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Qihua Zhou, Fang, S., Li, N. et al. Synthesis of Ultrahigh-Molecular-Weight Polyethylene with [OSNO]-type Bis(phenolate) Titanium Complexes. Polym. Sci. Ser. B 64, 581–589 (2022). https://doi.org/10.1134/S1560090422700440

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  • DOI: https://doi.org/10.1134/S1560090422700440

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