Effect of Alkyl Aluminums on Ethylene Polymerization Reactions with a Cr‐V Bimetallic Catalyst

B Liu, Z Tian, Y Jin, N Zhao, B Liu - Macromolecular Reaction …, 2018 - Wiley Online Library
The effect of introducing various types of alkyl aluminums directly into the catalyst and/or in
the polymerization process as cocatalyst on the efficiency of a Cr‐V bimetallic catalyst for …

The first vanadium‐oxide‐based UHMWPE catalyst supported on chemically modified silica gel

Y Jin, R Cheng, X He, Z Liu, N Zhao… - … Chemistry and Physics, 2017 - Wiley Online Library
Novel vanadium‐oxide‐based catalysts supported on alumina, zirconia, or titania‐modified
silica, which are able to synthesize ultrahigh molecular weight polyethylene (UHMWPE), are …

Synthesis, structures, and ethylene polymerization behavior of bis (pyrazolyl) borate zirconium and hafnium benzyl complexes

C Chen, H Lee, RF Jordan - Organometallics, 2010 - ACS Publications
The alkyl hydrido bis (pyrazolyl) borate reagent Tl (MeHB (3-mesitylpyrazolyl) 2)(Tl
(MeBpMs), 1) has been prepared and used to generate group 4 metal MeBpMs complexes …

Synthesis of double-end-capped polyethylene by a cationic tris (pyrazolyl) borate zirconium benzyl complex

K Nienkemper, H Lee, RF Jordan, A Ariafard… - …, 2008 - ACS Publications
The cationic complexes Tp* Zr (CH2Ph) 2+(I, B (C6F5) 4− salt; Tp*= HB (3, 5-Me2-pyrazolyl)
3) and {(PhCH2)(H) B (μ-Me2pz) 2} Zr (η2-Me2pz)(CH2Ph)+(II; Me2pz= 3, 5-Me2-pyrazolyl) …

Synthesis and reactivity of a sterically crowded tris (pyrazolyl) borate hafnium benzyl complex

H Lee, K Nienkemper, RF Jordan - Organometallics, 2008 - ACS Publications
The reaction of Hf (CH2Ph) 4 and Tl [TpMs*](TpMs*= HB (3-mesitylpyrazolyl) 2 (5-
mesitylpyrazolyl)−) yields TpMs* Hf (CH2Ph) 3 (1), bibenzyl, and Tl0 via ligand exchange …

Peculiarities of ethylene polymerization kinetics with an imido-vanadium/silyl-chromate bimetallic catalyst: Effect of polymerization conditions

B Liu, Z Tian, N Zhao, Z Liu, B Liu - Industrial & Engineering …, 2017 - ACS Publications
The effects of various polymerization conditions such as cocatalyst concentration, pressure,
temperature, and reaction time on ethylene homopolymerization over a SiO2-supported …

Tris (pyrazolyl) borate Ti (IV) complexes containing phenoxy ligands: effective catalyst precursors for ethylene polymerization that proceeds via cationic Ti (IV) species

K Itagaki, K Kakinuki, S Katao, T Khamnaen… - …, 2009 - ACS Publications
A series of phenoxy-substituted tris (pyrazolyl) borate titanium complexes, Tp′ TiCl2 (OAr)
and Tp* TiMe2 (OAr)[Tp= HB (pyrazolyl) 3, Tp*= HB (3, 5-Me2-pyrazolyl) 3; Ar= Ph, 2, 6 …

Toward the Optimization of a Cr‐V Bimetallic Catalyst for Producing Bimodal Polyethylene: Effect of Vanadium Content and Calcination Temperature

B Liu, Z Tian, Y Jin, N Zhao, B Liu - … Chemistry and Physics, 2018 - Wiley Online Library
This work covers the synthesis of bimodal polyethylene with a SiO2‐supported vanadium‐
oxide/silyl‐chromate (Cr‐V) bimetallic catalyst, which is prepared by using the residual …

Study of Silica‐Supported Chromocene Catalysts for Ethylene Polymerization

K Wang, Y Gao, J Yi, N Zhao, Y Jin… - … Chemistry and Physics, 2020 - Wiley Online Library
Ultrahigh molecular weight polyethylene (UHMWPE) has drawn great interest from
researchers because it possesses many excellent properties such as superb strength and …

Ethylene polymerization by phenoxy substituted tris (pyrazolyl) borate Ti (IV) methyl complexes

S Hasumi, K Itagaki, S Zhang, K Nomura - Macromolecules, 2011 - ACS Publications
Ethylene polymerization using Tp* TiMe2 (OAr)[Tp*= HB (3, 5-Me2-pyrazolyl) 3; Ar= O-2, 6-
Me2C6H3 (2a), O-2, 6-i Pr2C6H3 (2b)]-cocatalyst systems [cocatalyst: MAO,[Ph3C][B (C6F5) …