Results 1 to 10 of about 7,296 (274)

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

Molecules
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, Dedong Jia, Qiuyue Zhang, Yanping Ma, Qaiser Mahmood, Wen-Hua Sun   +5 more
doaj   +2 more sources

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

Molecules
The development of earth-abundant nickel-based catalysts is currently one of the greatest challenges for the straightforward synthesis of functionalized polyolefins.
Handou Zheng, Junsong Wang, Zonglin Qiu, Chunyu Feng, Haotian Zhou, Guangshui Tu, Haiyang Gao   +6 more
doaj   +2 more sources

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

Nature Communications
Synthesizing functionalized polyethylenes via ethylene coordination copolymerization with fundamental low-cost vinyl polar monomers provides a very attractive approach.
Shu-Yang Yu, Xiao-Yan Wang, Xiu-Li Sun, Yanshan Gao, Yanan Zhao, Xiao-Shan Ning, Gang Ji, Yuan Lu, Jie Yang, Zhi-Pan Liu, Yong Tang   +10 more
doaj   +2 more sources

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

Molecules
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, Yanping Ma, Yizhou Wang, Jiahao Gao, Yang Sun, Wen-Hua Sun   +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]

Nature 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, Jannick Vercammen, Lander Van Belleghem, Dirk De Vos   +3 more
doaj   +2 more sources

Ethylene Polymerization through Neutral Nickel Complexes Bearing Cyclic Imides

Advances 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, Maryam Sadat Beheshti, Amin Manteghi   +2 more
doaj   +1 more source

Unveiling the Effects of Thermal Aging on the Oxidative Stability of Biobased Low-Density Polyethylenes [PDF]

ACS Omega
Joanna Aniśko-Michalak, Anatolij Sokolohorskyj, Izabela Szafraniak-Wiza, Paulina Kosmela, Adam Piasecki, Mateusz Barczewski   +5 more
doaj   +2 more sources

ortho/para-Chlorinated α‑Diimine Nickel Precatalysts Resulting Polyethylenes with Improved Mechanical Properties and Controlled Crystallinity [PDF]

ACS Omega
Aoqian Xi, Qiuyue Zhang, Yanning Zeng, Yizhou Wang, Quanchao Wang, Yanping Ma, Xiang Hao, Wen-Hua Sun   +7 more
doaj   +2 more sources

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

Macromol, 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, Zeinab Saki, Claudio Pellecchia   +2 more
doaj   +1 more source

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

Macromol, 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, Senthil Kumar Kaliappan, Tej Pandit   +2 more
doaj   +1 more source