Modeling intraparticle transports during propylene polymerizations using supported metallocene and dual function metallocene as catalysts: Single particle model [PDF]
Chemical Industry and Chemical Engineering Quarterly, 2014 Two improved multigrain models (MGMs) for preparing homopolypropylene and long chain branched polypropylene via propylene polymerization using silica-supported metallocene or dual function metallocene as catalysts are presented in this paper ...
Li Hua-Rong, Che Liming, Luo Zheng-Hong
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MAO- and Borate-Free Activating Supports for Group 4 Metallocene and Post-Metallocene Catalysts of α-Olefin Polymerization and Oligomerization. [PDF]
Polymers (Basel), 2023 Modern industry of advanced polyolefins extensively uses Group 4 metallocene and post-metallocene catalysts. High-throughput polyolefin technologies demand the use of heterogeneous catalysts with a given particle size and morphology, high thermal ...
Nifant'ev IE +4 more
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Advances in High-Temperature Non-Metallocene Catalysts for Polyolefin Elastomers. [PDF]
Materials (Basel)Despite the great successes achieved by metallocene catalysts in high-value-added polyolefin elastomer, the challenging preparation conditions and undesirable high-temperature molecular weight capabilities have compromised the efficiency and cost of ...
Wang C, Li X, Chen S, Shan T.
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Fine Tuning of Catalyst Active Sites to Access Advanced Ultrahigh-Melting Polyolefins. [PDF]
Angew Chem Int Ed EnglA redesign of the active site of the pyridylamido hafnium (Hf) catalysts can enhance the performance of this catalyst family and unlock previously inaccessible polymer structures. When the catalyst is precontacted with allyltrimethylsilane the active species is modified and the catalyst experiences a new life becoming able to polymerize sterically ...
De Stefano F +3 more
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Titanium-Catalyzed Defluorination of Poly(Vinyl Fluoride) and Poly(Vinylidene Fluoride) Under Friedel-Crafts Conditions. [PDF]
Angew Chem Int Ed EnglCationic titanium sandwich catalysts display exceptional activity in the hydrodefluorination of Csp3─F bonds, in the presence of silanes and aromatic solvents (turnover numbers up to 3000). As a result, they can be used to defluorinate challenging fluoropolymers, such as poly(vinyl fluoride) (PVF) or poly(vinylidene fluoride) (PVDF).
Le Moigne L +9 more
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JACS Au, 2023 Correction to “Correlating the Morphological Evolution of Individual Catalyst Particles to the Kinetic Behavior of Metallocene-Based Ethylene Polymerization ...
Maximilian J. Werny +8 more
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Group 14 Metallocene Catalysts for Carbonyl Hydroboration and Cyanosilylation [PDF]
, 2023 A series of six Group 14 metallocene compounds (M = Ge, Sn, Pb) were studied as catalysts for carbonyl hydroboration and cyanosilylation reactions at room temperature.
Mallory, Fujiwara +2 more
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Active site nature of magnesium dichloride-supported titanocene catalysts in olefin polymerization [PDF]
Polyolefins Journal, 2015 Heterogeneous Ziegler-Natta and homogeneous metallocene catalysts exhibit greatly different active sitenature in olefin polymerization. In our previous study, it was reported that MgCl2-supported titanocenecatalysts can generate both Ziegler-Natta-type ...
Toshiaki Taniike +2 more
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Polymerization of sterically hindered a-olefins with single-site group 4 metal catalyst precursors [PDF]
Polyolefins Journal, 2016 A variety of group 4 metal catalytic systems (C2-symmetric {EBTHI}-, {SBI}-type zirconocene complexes (C2-1–4); C1-symmetric (C1-5–8) and Cs-symmetric (Cs-9) {Cp/Flu}-type zirconocene complexes; Cp*2ZrCl2 (Cp* 2-10)), half-metallocene complexes (CpTiCl3,
Gabriel Theurkauff +6 more
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Materials Proceedings, 2023 In this study, the state of catalysts is revealed during the growth of single-walled carbon nanotubes (SWCNTs) inside metallocene-filled SWCNTs. High-resolution transmission electron microscopy and Raman spectroscopy were used to study the kinetics of ...
Marianna V. Kharlamova
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