Scholarlink

<p>This study synthesized α-diimine nickel catalysts featuring two and three hydroxyl groups (<b>Cat1</b> and <b>Cat2</b>), along with their corresponding supported catalysts (<b>S-Cat1</b> and <b>S-Cat2</b>). These catalysts demonstrated high activity in ethylene polymerization, reaching up to 7 × 10<sup>6</sup> g/molNi·h, yielding polyethylenes with tunable molecular weights (174–553&#xa0;kg/mol), branching degrees (38–140/1000&#xa0;C) and higher elongation at break (up to 1230%). The catalyst bearing three hydroxyl groups and its supported catalyst exhibited slightly higher than that of the catalyst with two hydroxyl groups and its supported catalyst respectively, while also producing polymers with relatively higher molecular weights and slightly lower branching degrees. Compared to the homogeneous catalyst, the supported catalysts maintained high activity and thermal stability, yielding polyethylene with higher molecular weight, controllable morphology, high tensile strength (17.9&#xa0;MPa/22.5&#xa0;MPa) and moderate elongation at break (870%/660%).</p> Graphical Abstract <p></p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Ethylene Polymerization Using α-Diimine Nickel Catalysts with Multiple Hydroxyl Groups and Their Supported Catalysts

  • 期刊论文

  • 发表日期：

    2025年12月9日

查看全文
  • Lin-Lin Ye,
  • Qin Li,
  • Yan-Hui Hou,
  • Mi-Mi Cui,
  • Bin-Yuan Liu,
  • Min Yang

摘要

This study synthesized α-diimine nickel catalysts featuring two and three hydroxyl groups (Cat1 and Cat2), along with their corresponding supported catalysts (S-Cat1 and S-Cat2). These catalysts demonstrated high activity in ethylene polymerization, reaching up to 7 × 106 g/molNi·h, yielding polyethylenes with tunable molecular weights (174–553 kg/mol), branching degrees (38–140/1000 C) and higher elongation at break (up to 1230%). The catalyst bearing three hydroxyl groups and its supported catalyst exhibited slightly higher than that of the catalyst with two hydroxyl groups and its supported catalyst respectively, while also producing polymers with relatively higher molecular weights and slightly lower branching degrees. Compared to the homogeneous catalyst, the supported catalysts maintained high activity and thermal stability, yielding polyethylene with higher molecular weight, controllable morphology, high tensile strength (17.9 MPa/22.5 MPa) and moderate elongation at break (870%/660%).

Graphical Abstract