Results 41 to 50 of about 251,124 (199)

Six-coordinated half-metallocene catalyst for ethylene polymerization and its mechanism study

Giant
The demand for catalysts capable of enabling olefin polymerization at elevated temperatures to meet industrial requirements continues to grow. Among emerging candidates, novel six-coordinated half-metallocene catalysts, which combine the advantages of ...
Qian Li, Zifang Guo, Shuzhang Qu, Xinwei Li, Jian Chen, Yiming Wei, Cui Zheng, Zhihui Song, Yue Lan, Zhao Wen, Chaofan Yu   +10 more
doaj   +1 more source

Copolymerization of ethylene with α-olefins over highly active supported Ziegler-Natta catalyst with vanadium active component [PDF]

Polyolefins Journal, 2019
The new highly active supported vanadium-magnesium catalyst (VMC) has been studied in α-olefin (1-butene, 1-hexene)/ ethylene copolymerization in the presence of hydrogen.
Zenghui Zhao, Tatiana Mikenas, Vladimir Aleksandrovich Zakharov, Marina Nikolaeva, Mikhail Matsko, Elena Bessudnova, Wei Wu   +6 more
doaj   +1 more source

Synthesis of High-Molecular-Weight Branched Polyethylene Using a Hybrid “Sandwich” Pyridine-Imine Ni(II) Catalyst

Frontiers in Chemistry, 2022
Most pyridine-imine Ni(II) and Pd(II) catalysts tend to yield low-molecular-weight polyethylene and ethylene-based copolymers in olefin insertion polymerization, as the unilateral axial steric structure of such complexes often cannot provide effective ...
You Ge, You Ge, Qi Cai, Yuyin Wang, Jiangang Gao, Yue Chi, Shengyu Dai, Shengyu Dai   +7 more
doaj   +1 more source

Behavior of Metallocene Olefin Polymerization Catalysts under High Pressure^†

, 2016
Behavior of Metallocene Olefin Polymerization Catalysts under High Pressure†
Takaya Mise (3057204), Arno Fries (3057207), Noriyuki Suzuki (729010), Yoshitaka Yamaguchi (140591)   +3 more
core   +1 more source

Synthesis of and Olefin Polymerization Using Tethered, ansa-Metallocene Complexes

, 2016
Synthesis of and Olefin Polymerization Using Tethered, ansa-Metallocene ...
Scott Collins (696953), Young Soo-Ko (3057516), Jun Tian (308922), Yuding Feng (3057513), Robert Metcalfe (3057510)   +4 more
core   +1 more source

Recent Advancements in the Synthesis of Functional Polyolefins by Non-Bridged Half-Titanocenes

Molecules
Polyolefins are used widely due to their benefits such as being lightweight, chemical inertness, low cost, tunable properties, and easy processability. However, their nonpolar nature significantly limits their high-end applications.
Yanjun Chen, Haiqian Dong
doaj   +1 more source

Modelling the catalyst fragmentation pattern in relation to molecular properties and particle overheating in olefin polymerization [PDF]

Polyolefins Journal, 2014
A two-dimensional single particle finite element model was used to examine the effects of particle fragmental pattern on the average molecular weights, polymerization rate and particle overheating in heterogeneous Ziegler-Natta olefin polymerization.
Mohsen Najafi, Mahmoud Parvazinia, Mir Hamid Reza Ghoreishy   +2 more
doaj   +1 more source

Amine Catalyzed Solvent C−H Bond Activation as Deactivation Route for Cationic Decamethylzirconocene Olefin Polymerization Catalysts

, 2016
Amine Catalyzed Solvent C−H Bond Activation as Deactivation Route for Cationic Decamethylzirconocene Olefin Polymerization ...
Itzel Guerrero Rios (2239333), Bart Hessen (1463233), Siebe van der Veer (2239330), Marco W. Bouwkamp (1463230), Elena Novarino (1463239)   +4 more
core   +2 more sources

“Bound but Not Gagged”Immobilizing Single-Site α-Olefin Polymerization Catalysts

, 2016
“Bound but Not Gagged”Immobilizing Single-Site α-Olefin Polymerization ...
John C. Chadwick (2198137), John R. Severn (1588984), Nic Friederichs (1588990), Robbert Duchateau (1730272)   +3 more
core   +1 more source

Polimerização de estireno utilizando compostos organolantanídeos ativados por MAO

Química Nova, 2006
In an attempt to improve the performance of organolanthanide catalysts we investigated the use of the industrially important cocatalyst methylaluminoxane (MAO) to activate organolanthanide compounds in olefin polymerization. The catalytic systems LnBrCp2(
Alessandra de Souza Maia, Josué Garcia Quini, Renata Diana Miotti, Wanda de Oliveira   +3 more
doaj   +1 more source