Results 1 to 10 of about 1,336 (113)

Tuning 2,3-Bis(arylimino)butane-nickel Precatalysts for High-Molecular-Weight Polyethylene Elastomers [PDF]

open access: yesMolecules
The catalytic performance of α-diiminonickel complexes is highly sensitive to structural modifications in their ligand frameworks. In this study, a series of unsymmetrical 2,3-bis(arylimino)butane-nickel complexes featuring ortho-2,6-dibenzhydryl groups ...
Dongzhi Zhu   +5 more
doaj   +2 more sources

Controlled Copolymerization of Ethylene and Biosourced Comonomers Using Dibenzobarrelene-Based α-Diimine Nickel Catalyst [PDF]

open access: yesMolecules
The development of earth-abundant nickel-based catalysts is currently one of the greatest challenges for the straightforward synthesis of functionalized polyolefins.
Handou Zheng   +6 more
doaj   +2 more sources

Cyano-functionalized polyethylenes from ethylene/acrylamide copolymerization [PDF]

open access: yesNature Communications
Synthesizing functionalized polyethylenes via ethylene coordination copolymerization with fundamental low-cost vinyl polar monomers provides a very attractive approach.
Shu-Yang Yu   +10 more
doaj   +2 more sources

Finely-Tuned Bis(imino)pyridylcobalt Complexes Enhance Ethylene Polymerization: The Role of Bulky and Halogen Substituents [PDF]

open access: yesMolecules
The bis(imino)pyridylcobalt complexes have been finely tuned through using the aniline derivative bearing a meta-chloro substituent, besides its ortho- and para-di(4-fluorophenyl)methyl and ortho-methyl substituents for the series of 2-[1-(3-chloro-4,6 ...
Elizabeth Ogbe   +5 more
doaj   +2 more sources

Upcycling polyethylene into closed-loop recyclable polymers through titanosilicate catalyzed C-H oxidation and in-chain heteroatom insertion [PDF]

open access: yesNature Communications
Polyolefins are the most widely produced type of plastics owing to their low production cost and favorable properties. Their polymer backbone consists solely of inert C-C bonds, making them resistant and durable materials.
Robin Lemmens   +3 more
doaj   +2 more sources

Ethylene Polymerization through Neutral Nickel Complexes Bearing Cyclic Imides

open access: yesAdvances in Polymer Technology, 2022
The catalyst synthesis of salicylaldimine Ni(II) complexes with bulky imide moieties, ethylene polymerization, and characterization of synthesized polyethylenes are described in this paper.
Hassan Arabi   +2 more
doaj   +1 more source

Iminopyridine Ni(II) Catalysts Affording Oily Hyperbranched Ethylene Oligomers and/or Crystalline Polyethylenes Depending on the Reaction Conditions: Possible Role of In Situ Catalyst Structure Modifications

open access: yesMacromol, 2021
Nickel-based ethylene polymerization catalysts have unique features, being able to produce macromolecules with a variable content of branches, resulting in polymers ranging from semicrystalline plastics to elastomers to hyperbranched amorphous waxes and ...
Ilaria D’Auria   +2 more
doaj   +1 more source

Influence of Ethylene-1-Alkene Copolymers Microstructure on Thermo-Rheological Behavior of Model Blends for Enhanced Recycling

open access: yesMacromol, 2022
Polyethylenes (PE) are the most commonly occurring ingredients for post-consumer recyclates (PCR). The structure–property relationships of different types of model PE-based blends are established using multiple thermo-rheological analyses.
Girish Galgali   +2 more
doaj   +1 more source

Radio-Oxidation of Electric Cabled Models: Ageing Evaluation at the Atomic Scale

open access: yesEnergies, 2022
The functionality of electric cables, being the safety components of plants, has to be ensured. In nuclear power plants, when they are in the reactor building, these cables can suffer γ irradiation even in normal operating conditions.
Muriel Ferry, Frederic Miserque
doaj   +1 more source

Polymerization of Ethylene Catalyzed by Vanadium(III) Complexes

open access: yesOrbital: The Electronic Journal of Chemistry, 2017
Thirty five  complexes of 1,2- bis(benzimidazole, benzothiazole and benzoxazole)benzene,  1,2-bis(benzimidazole, benzothiazole and benzoxazole)-4-methyl-benzene, 1,2-bis  (benzimidazole, benzothiazole and benzoxazole)4-bromobenzene, 1, 2-bis ...
Hamdi Ali Elagab
doaj   +3 more sources

Home - About - Disclaimer - Privacy