Results 31 to 40 of about 1,728 (185)
The charge percolation mechanism and simulation of Ziegler–Natta polymerizations Part III. Oxidation states of transition metals [PDF]
Journal of the Serbian Chemical Society, 2006 The oxidation state of the transition metal (Mt) active centre is the most disputable question in the polymerization of olefins by Ziegler–Natta (ZN) and metallocene complexes.
BRANKA PILIC +5 more
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Materials Research, 2001 Polypropylene with special properties can be obtained by metallocenic catalysts. These catalytic systems represent the beginning of a new age in polyolefins technology. In this work, the influence of the addition of a syndiotactic polypropylene (s-PP) on
Maria de Fátima V. Marques +2 more
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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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Molecules, 2021 Homogeneous olefin polymerization catalysts are activated in situ with a co-catalyst ([PhN(Me)2-H]+[B(C6F5)4]− or [Ph3C]+[B(C6F5)4]−) in bulk polymerization media. These co-catalysts are insoluble in hydrocarbon solvents, requiring excess co-catalyst (>3
Hyun-Ju Lee +7 more
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Angewandte Chemie, Volume 138, Issue 35, 24 August 2026.Masked divalent yttrium and gadolinium dinitrogen complexes mediate the fragmentation of white phosphorus, converting P4 into discrete dimetallic complexes of [P4]2– and [P2]2– ligands, and an unprecedented monatomic P2– radical ligand. Structural, spectroscopic, magnetic, and DFT studies reveal insight into the bonding between these unusual Pn units ...
Arpan Mondal, Richard A. Layfield
wiley +2 more sources
Effect of group 5–10 transition metallocenes on polybenzoxazine pyrolysis
Carbon TrendsPolymeric carbon precursors typically yield poorly ordered sp² hybridized carbon after pyrolysis at 1000 °C. This poor ordering results in a turbostratic carbon that lacks the thermomechanical properties of the carbon produced from more graphitizable ...
Faheem H. Muhammed +7 more
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Acta Crystallographica Section E: Crystallographic Communications, 2017 The crystal structure of a solvated zirconocene pentafulvene complex with a bulky adamantylidene substitution pattern, namely (η5,η1-adamantylidenepentafulvene)bis(η5-cyclopentadienyl)zirconium(IV)–toluene–n-hexane (8/1/1), [Zr(C15H18)(C5H5)2]·0.125C7H8 ...
Malte Fischer +2 more
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Modeling of metallocene catalyzed propylene polymerization in fluidized bed reactors [PDF]
MATEC Web of Conferences, 2019 A study was performed to improve the model for metallocene catalyzed polyolefin polymerization in fluidized bed reactor by adapting multi-scale modeling approach.
Law Chew-Sang, Hussain Mohd Azlan
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Molecules, 2022 A combination of different types of redox-active systems in one molecule makes it possible to create coordination compounds with extended redox abilities, combining molecular and electronic structures determined by the features of intra- and ...
Svetlana V. Baryshnikova +1 more
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Polímeros, 2003 The intermolecular defect distribution of poly(propylenes) of the Ziegler-Natta (ZN) and metallocene (M) types is assessed by classical fractionation and analysis of the fractions by GPC and 13C NMR.
Rufina G. Alamo
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