Bis-cycloheptyl-fused bis(imino)pyridine-cobalt catalysts for PE wax formation: positive effects of fluoride substitution on catalytic performance and thermal stability

2020 ◽  
Vol 49 (27) ◽  
pp. 9425-9437 ◽  
Author(s):  
Qiuyue Zhang ◽  
Ningning Wu ◽  
Junfeng Xiang ◽  
Gregory A. Solan ◽  
Hongyi Suo ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Molecular Weight ◽  
Ethylene Polymerization ◽  
Catalytic Performance ◽  
Cobalt Catalysts ◽  
Low Molecular Weight ◽  
Polymerization Catalysts ◽  
Positive Effects

The depicted ethylene polymerization catalysts exhibited optimal activities at 60 °C forming low molecular weight PE waxes; ortho-F substitution proved beneficial.

Doubly fused N,N,N-Iron Ethylene Polymerization Catalysts appended with Fluoride Substituents; probing catalytic performance via a combined experimental and MLR study

2021 ◽  
Author(s):  
Qiuyue Zhang ◽  
Wenhong Yang ◽  
Zheng Wang ◽  
Gregory A. Solan ◽  
Tongling Liang ◽  
...  
Keyword(s):  
Ethylene Polymerization ◽  
Catalytic Performance ◽  
Chloride Complex ◽  
Polymerization Catalysts

Access to six examples of α,α’-bis(imino)-2,3:5,6-bis(pentamethylene)pyridine-iron(II) chloride complex, [2,3:5,6-{C4H8C(N(2-R1-4-R3-6-R2C6H2)}2C5HN] (R1 = Me, R2 = R3 = CH(p-FPh)2 Fe1; R1 = Et, R2 = R3 = CH(p-FPh)2 Fe2; R1 = iPr,...

Systematic studies on dibenzhydryl and pentiptycenyl substituted pyridine-imine nickel(ii) mediated ethylene polymerization

2020 ◽  
Vol 49 (15) ◽  
pp. 4824-4833 ◽  
Author(s):  
Chaoqun Wang ◽  
Yuxing Zhang ◽  
Hongliang Mu ◽  
Zhongbao Jian
Keyword(s):  
Molecular Weight ◽  
Ethylene Polymerization ◽  
Nickel Catalysts ◽  
Low Molecular Weight

Pyridine-imine nickel catalysts bearing different N-aryl/imine substituents were systematically studied for ethylene polymerization to produce low-molecular-weight and branched polyethylenes.

scholarly journals Chromium ethylene polymerization catalysts bearing sterically enhanced α,α′-bis(imino)-2,3:5,6-bis(pentamethylene)pyridines: Tuning activity and molecular weight

Polymer ◽  
2019 ◽  
Vol 171 ◽  
pp. 87-95 ◽  
Author(s):  
Chantsalnyam Bariashir ◽  
Zheng Wang ◽  
Gregory A. Solan ◽  
Chuanbing Huang ◽  
Xiang Hao ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Ethylene Polymerization ◽  
Polymerization Catalysts

scholarly journals In between molecules and self-assembled fibrillar networks: highly stable nanogel particles from a low molecular weight hydrogelator

Soft Matter ◽  
2019 ◽  
Vol 15 (17) ◽  
pp. 3565-3572 ◽  
Author(s):  
Ana Torres-Martínez ◽  
César A. Angulo-Pachón ◽  
Francisco Galindo ◽  
Juan F. Miravet
Keyword(s):  
Thermal Stability ◽  
Molecular Weight ◽  
Low Molecular Weight ◽  
Self Assembled ◽  
Low Molecular Weight Gelator

A low molecular weight gelator forms reproducibly nanogel particles with good temporal and thermal stability and they present accessible hydrophobic domains.

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.

scholarly journals Positive effects of a novel non-peptidyl low molecular weight radical scavenger in renal ischemia/reperfusion: a preliminary report

SpringerPlus ◽  
2014 ◽  
Vol 3 (1) ◽  
pp. 158 ◽  
Author(s):  
Roberto Bassi ◽  
Andrea Vergani ◽  
Francesca D’Addio ◽  
Moufida Nasr ◽  
Alessio Mocci ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Preliminary Report ◽  
Ischemia Reperfusion ◽  
Renal Ischemia ◽  
Radical Scavenger ◽  
Low Molecular Weight ◽  
Positive Effects

Titanium pyridyl-phosphinimide complexes — Synthesis, structure, and ethylene polymerization catalysis

2006 ◽  
Vol 84 (5) ◽  
pp. 755-761 ◽  
Author(s):  
Chad Beddie ◽  
Pingrong Wei ◽  
Douglas W Stephan
Keyword(s):  
Molecular Weight ◽  
Key Words ◽  
Ethylene Polymerization ◽  
Olefin Polymerization ◽  
Polymerization Catalysts ◽  
Pyridyl Group ◽  
Molecular Weight Distributions ◽  
Polymerization Catalysis ◽  
Weight Distributions

A series of Ti–pyridyl-phosphinimide complexes of the form Cp′TiX2[NPR2(2-CH2Py)] (Cp′ = Cp, Cp*, R = i-Pr, t-Bu, X = Cl, Me) have been prepared and characterized. These complexes generate ethylene polymerization catalysts upon activation with MAO or B(C6F5)3. The resulting polymers exhibit broad molecular weight distributions. The role of the pyridyl group is discussed in light of stoichiometric reactions of CpTiCl2[NPR2(2-CH2Py)] with B(C6F5)3.Key words: phosphinimide complexes, pyridyl-phosphinimides, olefin polymerization.

Synthesis of hyperbranched low molecular weight polyethylene oils by an iminopyridine nickel(ii) catalyst

2017 ◽  
Vol 8 (41) ◽  
pp. 6443-6454 ◽  
Author(s):  
Ilaria D'Auria ◽  
Stefano Milione ◽  
Tonino Caruso ◽  
Gabriele Balducci ◽  
Claudio Pellecchia
Keyword(s):  
Molecular Weight ◽  
Diffraction Analysis ◽  
Ethylene Polymerization ◽  
Low Molecular Weight ◽  
X Ray Diffraction ◽  
X Ray

A 6-(2,6-dimethylphenyl)-2-(2,6-diisopropylphenyl)iminopyridine dibromo nickel(ii) complex was synthesized, characterized by X-ray diffraction analysis and tested in ethylene polymerization using diethylaluminumchloride as the cocatalyst.

Sign in / Sign up

Export Citation Format

Share Document