Results 61 to 70 of about 637 (179)

Paramagnetic species in Ziegler Natta catalysts

, 2023
Abstract: This doctoral thesis investigates the nature and behavior of paramagnetic Ti(III) species in industrial Ziegler-Natta catalysts (ZNCs) used for the polymerization of polyethylene and polypropylene and is the result of a collaborative effort between the EPR laboratories of the University of Torino, the University of Antwerp and the Giulio ...
openaire   +2 more sources

On the Bona Fide Sampling of Reaction Candidates in Red Moon Method by Replica‐Exchange Molecular Dynamics Method: REMD‐RM Method and Its Efficacy in Polymerization and Cross‐Linking Reactions of Polypropylene

Journal of Computational Chemistry, Volume 47, Issue 7, March 15, 2026.
Schematic representation of the REMD‐RM method, which integrates the Red Moon (RM) method and the replica‐exchange molecular dynamics (REMD) method. By enhancing molecular reconfiguration and diffusion in the reactant system, the REMD‐RM method can efficiently explore a wide phase space and effectively accelerate the search for reaction candidates ...
Kentaro Matsumoto, Yuichi Tanaka, Seiryu Umetani, Takashi Nakano, Masataka Nagaoka   +4 more
wiley   +1 more source

Olefin Polymerizations Oriented by Rational Designs of Group‐13 Compounds

The Chemical Record, Volume 26, Issue 3, March 2026.
In coordination olefin polymerization chemistry, boron and aluminum compounds play important roles in both catalyst components and monomers. This personal account introduces our recent progress on the development of catalyst systems featured by the design of group‐13 counteranions, as well as the application of boronic acid‐crosslinked polyolefins to ...
Ryo Tanaka, Yu Zou
wiley   +1 more source

Effect of EtOH/MgCl2 Molar Ratios on the Catalytic Properties of MgCl2-SiO2/TiCl4 Ziegler-Natta Catalyst for Ethylene Polymerization

Molecules, 2011
MgCl2-SiO2/TiCl4 Ziegler-Natta catalysts for ethylene polymerization were prepared by impregnation of MgCl2 on SiO2 in heptane and further treatment with TiCl4.
Piyasan Praserthdam, Supanan Patthamasang, Bunjerd Jongsomjit   +2 more
doaj   +1 more source

The influence of magnesium dichloride as support on molecular weights of the polyethylenes produced by Ziegler-Natta catalyst [PDF]

Polyolefins Journal
The paper presents data on the effect exerted by magnesium dichloride in Ziegler-Natta catalysts on the activity and molecular weight of polyethylene (PE) produced by ethylene polymerization in the absence or presence of hydrogen.
Tatiana Mikenas, A. Sholma, Vladimir A. Zakharov, Mikhail Matsko   +3 more
doaj   +1 more source

Innovative catalytic systems driving sustainable olefin polymerization: Recent advances and green chemistry approaches [PDF]

Polyolefins Journal
This mini-review addresses the burgeoning requirements for environmentally friendly processes in the polymer industry, focusing on recent progress in developing catalytic systems for sustainable olefin polymerization.
Farabi Hossain, Md Enamul Hoque
doaj   +1 more source

Ziegler–Natta Catalysts: Applications in Modern Polymer Science

SynOpen, 2023
Keshav Taruneshwar Jha, Abhimannu Shome, Pooja A Chawla   +2 more
doaj   +1 more source

Ethylene and 1-butene Oligomerization with Benzimidazole Complexes of Nickel and Iron: A Case of Tandem Reaction

Reactions
The coordination chemistry of benzimidazole ligands combines σ donation and π backbonding. Owing to this electronic flexibility, benzimidazole ligands stabilize both electron deficient and electron-rich transition states in the catalytic cycle of Ziegler-
Nelson N. dos Santos, Marcos F. Silva, Alexandre F. Young, Marcos L. Dias, Mariana M. V. M. Souza   +4 more
doaj   +1 more source

Control of a Fluidized Bed Polyethylene Reactor [PDF]

Iranian Journal of Chemistry & Chemical Engineering, 2008
In present paper, dynamic behavior and control of a fluidized bed reactor for polyethylene production has been considered. A double active sites model for Ziegler-Natta catalysts is used for simulation of polymerization reaction. Hydrodynamic behavior of
Omid Vahidi, Mohammad Shahrokhi, Ahmad Mirzaei   +2 more
doaj  

Influence of the Ethanol Content of Adduct on the Comonomer Incorporation of Related Ziegler-Natta Catalysts in Propylene (Co)polymerizations. [PDF]

Polymers (Basel), 2023
Mehdizadeh M, Karkhaneh F, Nekoomanesh M, Sadjadi S, Emami M, Teimoury H, Salimi M, Solà M, Poater A, Bahri-Laleh N, Posada-Pérez S.   +10 more
europepmc   +1 more source