Ethylene polymerization catalyzed by dinickel complexes with a double-decker structure

2017 ◽  
Vol 8 (34) ◽  
pp. 5112-5119 ◽  
Author(s):  
Daisuke Takeuchi ◽  
Yuriko Chiba ◽  
Shigenaga Takano ◽  
Hideo Kurihara ◽  
Minoru Kobayashi ◽  
...  
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Ethylene Polymerization ◽  
High Crystallinity ◽  
Double Decker

Double-decker dinickel catalysts, even without any substituent on an ortho-position, afforded high molecular weight polyethylene with high crystallinity and less branching.

Chromium complexes supported by the bidentate PN ligands: synthesis, characterization and application for ethylene polymerization

2018 ◽  
Vol 47 (38) ◽  
pp. 13459-13465 ◽  
Author(s):  
Quande Zheng ◽  
Dejuan Zheng ◽  
Binghao Han ◽  
Shaofeng Liu ◽  
Zhibo Li
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Ethylene Polymerization ◽  
Chromium Complexes ◽  
Highly Active ◽  
Imine Ligands

Chromium complexes bearing phosphine–imine ligands are highly active for ethylene polymerization and produce HDPE with a high molecular weight.

scholarly journals Enhancing thermostability of iron ethylene polymerization catalysts through N,N,N-chelation of doubly fused α,α′-bis(arylimino)-2,3:5,6-bis(hexamethylene)pyridines

2019 ◽  
Vol 9 (8) ◽  
pp. 1933-1943 ◽  
Author(s):  
Zheng Wang ◽  
Randi Zhang ◽  
Wenjuan Zhang ◽  
Gregory A. Solan ◽  
Qingbin Liu ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Catalytic Activity ◽  
High Molecular Weight ◽  
Ethylene Polymerization ◽  
High Catalytic Activity ◽  
Polymerization Catalysts ◽  
Fe Catalyst

At temperatures up to 80 °C, high catalytic activity and high molecular weight PE was achievable using the Fe-catalyst depicted.

Asymmetric bis-salicylaldiminato binuclear titanium complexes for ethylene polymerization and copolymerization

2021 ◽  
Author(s):  
Yawen Qin ◽  
Tingcheng Li ◽  
Xiong Chen ◽  
Jian Li ◽  
Xiang Meng ◽  
...  
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Molecular Weight Distribution ◽  
Weight Distribution ◽  
Ethylene Polymerization ◽  
Titanium Complexes ◽  
Broad Molecular Weight Distribution

Polyolefins with high molecular weight and broad molecular weight distribution have attracted great attention due to their ease of processing and wide applications. In this paper, methylene-bridged asymmetric disalicylaldimine ligands...

Advancing polyethylene properties by incorporating NO2 moiety in 1,2-bis(arylimino)acenaphthylnickel precatalysts: synthesis, characterization and ethylene polymerization

2017 ◽  
Vol 46 (21) ◽  
pp. 6934-6947 ◽  
Author(s):  
Qaiser Mahmood ◽  
Yanning Zeng ◽  
Xinxin Wang ◽  
Yang Sun ◽  
Wen-Hua Sun
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Ethylene Polymerization ◽  
Ultra High Molecular Weight

A family of 1-(2,6-dibenzhydryl-4-nitrophenylimino)-2-aryliminoacenaphthylnickel halides, on activation with either Et2AlCl or EASC, produced ultra-high-molecular-weight highly branched polyethylenes.

scholarly journals From polyethylene waxes to HDPE using an α,α′-bis(arylimino)-2,3:5,6-bis(pentamethylene)pyridyl-chromium(iii) chloride pre-catalyst in ethylene polymerisation

2017 ◽  
Vol 46 (21) ◽  
pp. 6948-6957 ◽  
Author(s):  
Chuanbing Huang ◽  
Shizhen Du ◽  
Gregory A. Solan ◽  
Yang Sun ◽  
Wen-Hua Sun
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Ethylene Polymerization ◽  
Co Catalyst ◽  
Catalytic Activities ◽  
Ethylene Polymerisation

Depending on the aluminium-alkyl co-catalyst employed, the title Cr(iii) chlorides can exhibit high catalytic activities in ethylene polymerization, producing either high molecular weight PE or linear PE waxes.

Sterically very bulky aliphatic/aromatic phosphine-sulfonate palladium catalysts for ethylene polymerization and copolymerization with polar monomers

2019 ◽  
Vol 10 (4) ◽  
pp. 546-554 ◽  
Author(s):  
Jian Xia ◽  
Yixin Zhang ◽  
Xiaoqiang Hu ◽  
Xin Ma ◽  
Lei Cui ◽  
...  
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Palladium Catalysts ◽  
Ethylene Polymerization ◽  
Polar Monomers

Copolymerization of ethylene and polar monomers with significantly high molecular weight and activity was achieved using bulky aliphatic/aromatic phosphine-sulfonate palladium catalysts.

α-Diimine nickel complexes bearing axially bulky terphenyl and equatorially bulky dibenzobarrelene groups: synthesis, characterization and olefin polymerization studies

2020 ◽  
Vol 11 (42) ◽  
pp. 6783-6793
Author(s):  
Xiaohua Wang ◽  
Bo Dong ◽  
Qi Yang ◽  
Heng Liu ◽  
Chunyu Zhang ◽  
...  
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Ethylene Polymerization ◽  
Olefin Polymerization ◽  
Nickel Complexes ◽  
Catalytic Activities ◽  
New Family ◽  
Ultra High Molecular Weight

A new family of asymmetric α-diimine nickel complexes bearing axially and equatorially bulky groups were synthesized successfully. They exhibited high catalytic activities for ethylene polymerization and afforded ultra-high-molecular-weight elastomeric polyethylenes.

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