Synthesis and Characterization of Phosphinobenzenamine Palladium Complexes and Their Application in Ethylene Polymerization and Copolymerization with Polar Monomers

Lixin Cao, Zhengguo Cai*, Mingyuan Li*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

A series of phosphinobenzenamine palladium complexes Pd1–Pd5 with different substituents was successfully synthesized and characterized. X-ray diffraction analysis of Pd1, Pd2, and Pd4 revealed that the palladium complexes exhibited an almost square–planar geometry and structural distinctions compared with previously reported N∧P-based palladium complexes. These palladium complexes exhibited high activity (4.92 × 105 g mol–1 h–1) toward ethylene polymerization with excellent thermal stability up to 100 °C to produce semicrystalline polyethylenes bearing unsaturated vinylene/vinyl groups with moderate branch densities (15–26/1000 C). Most importantly, they could promote the copolymerization of ethylene and polar monomers, such as methyl acrylate (MA) and 5-hexene-1-yl-acetate (HAc), even at a high temperature of 80 °C.
Original languageEnglish
JournalOrganometallics
DOIs
StatePublished - 18 Nov 2022

Keywords

  • Catalysts
  • Ethylene polymerization
  • Hydrocarbons
  • Palladium
  • Palladium complexes

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