Organometallic Complex Synthesis and Catalysis Peer reviewed

Ethylene/Propylene Copolymerization and Ethylene/Propylene/5-Ethylidene-2-Norbornene Terpolymerization Using Half-Sandwich Titanium Complexes with α-Naphthoxide Ligands as Catalysts

С. Л. Саратовских, Igor V. Zharkov, С. А. Жуков, E. E. Faingol’d and 4 more

Petroleum Chemistry | Jun 14, 2026

Abstract

Abstract

Abstract A novel half-sandwich titanium complex, Cp*Ti(1-C10H7O)Cl2, containing an α-naphthoxide fragment, was synthesized. Modified methylaluminoxane (MMAO-12) and perfluoroaryl boron-containing activators B(C6F5)3 and [Ph3C][B(C6F5)4] combined with triisobutylaluminum were used to activate the precatalyst. The resulting catalysts produced binary and ternary copolymers of ethylene with propylene and 5-ethylidene-2-norbornene. The composition, molecular weight characteristics, and thermophysical properties of the copolymers—including those of ethylene/propylene copolymer samples after stepwise isothermal melt crystallization—were characterized. The copolymerization performance of the catalysts was compared with previously studied similar systems based on the half-sandwich titanium complex Cp*Ti(O2,6iPr2C6H3)Cl2. The properties of the copolymers were also assessed comparatively. The synthesized catalytic systems produced polymer mixtures consisting of low-molecular-weight (comonomer-enriched) fractions and high-molecular-weight polyethylene fractions, likely due to the generation of two different types of active sites responsible for producing bimodal copolymers.

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С. Л. Саратовских

first | Institute of Problems of Chemical Physics | ORCID 0000-0002-2419-807X

Igor V. Zharkov

middle | Institute of Problems of Chemical Physics | ORCID 0000-0001-6355-923X

С. А. Жуков

middle | Institute of Problems of Chemical Physics | ORCID 0009-0005-0624-1280

E. E. Faingol’d

middle | Institute of Problems of Chemical Physics | ORCID 0000-0002-3332-3741

A. N. Panin

middle | Institute of Problems of Chemical Physics | ORCID 0000-0002-6279-5975

Artur T. Kapasharov

middle | Institute of Problems of Chemical Physics | ORCID 0000-0002-2536-5167

Dmitry A. Chernyayev

middle | Institute of Problems of Chemical Physics | ORCID 0000-0002-2642-259X

N. M. Bravaya

last | Institute of Problems of Chemical Physics | ORCID 0000-0001-7773-5521

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Citation

BibTeX

@article{2026Ethylene,
  title = {Ethylene/Propylene Copolymerization and Ethylene/Propylene/5-Ethylidene-2-Norbornene Terpolymerization Using Half-Sandwich Titanium Complexes with α-Naphthoxide Ligands as Catalysts},
  author = {С. Л. Саратовских and Igor V. Zharkov and С. А. Жуков and E. E. Faingol’d and A. N. Panin and Artur T. Kapasharov and Dmitry A. Chernyayev and N. M. Bravaya},
  journal = {Petroleum Chemistry},
  year = {2026},
  doi = {10.1134/s0965544126600281},
  url = {https://doi.org/10.1134/s0965544126600281}
}

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