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Updated: Jan 9, 2026

Ethylene Polymerizations Using Parallel Pressure Reactors and a Kinetic Analysis of Chain Transfer Polymerization
Published on: November 27, 2015
Vanadium(V) Complexes Bearing Bidentate Phenoxy-Phosphine Ligands and Their High Performance Toward Ethylene
Biao Li1, Wenzheng Feng1, Li Pan1,2
1School of Materials Science and Engineering, State Key Laboratory of High-Performance Roll Materials and Composite Forming, Tianjin University, Tianjin, China.
None:
A new series of imido-vanadium(V) complexes bearing bidentate phenoxy-phosphine ligands was synthesized in high yields and fully characterized by NMR spectroscopy, elemental analysis, and single-crystal X-ray diffraction. These complexes were systematically evaluated as efficient catalysts for ethylene polymerization. Among them, complex C1 exhibited exceptional activity, up to 446.5 × 106 gPE (molV)-1·h-1, along with excellent thermal stability (120°C), long catalytic lifetime (120 min), and broad solvent compatibility. The produced polyethylene samples spanned moderate to ultra-high molecular weights, with a maximum of 160.4 × 104 Da. Systematic structure-activity-polymer investigations revealed that both steric and electronic variations on ligand critically tune catalytic behavior and polymer properties, underscoring the effectiveness of phenoxy-phosphine framework and providing valuable insights for the rational design of high-performance polyolefin catalysts.
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