Covalent Organic Framework‐Supported Metallocene for Ethylene Polymerization

• DOI: 10.1002/chem.202300913
• Publication Date: 2023-06-21T10:25:31Z
• Authors: Bangban Zhu; Kan Liu; Liqiong Luo; Ziyang Zhang; Yangke Xiao; Minghao Sun; Suyun Jie; Wen‐Jun Wang; Jijiang Hu; Shengbin Shi; Qingyue Wang; Bo‐Geng Li; Pingwei Liu
• Keywords: Post-metallocene catalyst; Molar mass distribution

The loading of homogeneous catalysts with support can dramatically improve their performance in olefin polymerization. However, the challenge lies development supported well-defined pore structures and good compatibility to achieve high catalytic activity product performance. Herein, we report use an emergent class porous material-covalent organic framework material (COF) as a carrier metallocene catalyst-Cp2 ZrCl2 for ethylene COF-supported catalyst demonstrates higher 31.1×106 g mol-1 h-1 at 140 °C, compared 11.2×106 homogenous one. resulting polyethylene (PE) products possess weight-average molecular weight (Mw ) narrower distribution (Ð) after COF supporting, that is, Mw increases from 160 308 kDa Ð drops 3.3 2.2. melting point (Tm is also increased by up 5.2 °C. Moreover, PE possesses characteristic filamentous microstructure tensile strength 19.0 30.7 MPa elongation break 350 1400 % loading. We believe carriers will facilitate future highly efficient polymerization high-performance polyolefins.