Influence of Polyethylene Glycol Unit on Palladium‐ and Nickel‐Catalyzed Ethylene Polymerization and Copolymerization

The transition‐metal‐catalyzed copolymerization of olefins with polar functionalized co‐monomers represents a major challenge in the field of olefin polymerization. It is extremely difficult to simultaneously achieve improvements in catalytic activity, polar monomer incorporation, and copolymer mole...

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Bibliographic Details
Published in:Angewandte Chemie International Edition 2017-11, Vol.56 (46), p.14672-14676
Main Authors: Zhang, Dan, Chen, Changle
Format: Article
Language:English
Subjects:
Alkenes
Catalysis
Catalysts
Catalytic activity
Copolymerization
Ethylene
Molecular weight
Monomers
Nickel
olefin polymerization
Palladium
Phosphine
polar monomer
Polyethylene glycol
Polymerization
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Summary:The transition‐metal‐catalyzed copolymerization of olefins with polar functionalized co‐monomers represents a major challenge in the field of olefin polymerization. It is extremely difficult to simultaneously achieve improvements in catalytic activity, polar monomer incorporation, and copolymer molecular weight through ligand modifications. Herein we introduce a polyethylene glycol unit to some phosphine‐sulfonate palladium and nickel catalysts, and its influence on ethylene polymerization and copolymerization is investigated. In ethylene polymerization, this strategy leads to enhanced activity, catalyst stability, and increased polyethylene molecular weight. In ethylene copolymerization with polar monomers, improvements in all copolymerization parameters are realized. This effect is most significant for polar monomers with hydrogen‐bond‐donating abilities. PEGged forward: Polyethylene glycol (PEG) substituents are installed in phosphine‐sulfonate palladium and nickel catalysts. The polyethylene glycol unit shows beneficial effects in ethylene polymerization and copolymerization reactions.
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.201708212