Results 41 to 50 of about 637 (179)
Journal of Polymer Science, EarlyView.The stereochemistry of polybutadiene made by ring‐opening metathesis polymerization (ROMP) evolves both during and after polymerization, as secondary metathesis shifts cis‐rich kinetic products toward trans‐rich equilibrium compositions. By tuning catalyst identity, additives, temperature, and reaction time, polybutadienes with 28%–80% trans content ...
Amira S. Eldin, Michael D. Schulz
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ReactionsIn this work, an attempt is made to theoretically substantiate the experimentally known facts of the influence of halogen concentration on the catalytic properties of the neodymium-based Ziegler–Natta system.
Alexey N. Masliy +3 more
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From Cages to Sheets: Computational Elucidation of Methylaluminoxane Structure and Reactivity
ChemPlusChem, Volume 91, Issue 8, August 2026.Methylaluminoxane (MAO), the dominant cocatalyst in metallocene‐based olefin polymerization, has resisted structural characterization for decades. This review traces the computational journey from early cage and nanotube proposals to the identification of two‐dimensional aluminoxane sheets as the thermodynamically preferred motif, and how this ...
Mikko Linnolahti +2 more
wiley +1 more source
Discovery and development of metallocene-based polyolefins with special properties [PDF]
Polyolefins Journal, 2015 Beside Ziegler-Natta and Phillips catalysts the development of methylaluminoxane (MAO) as cocatalyst in combination with metallocenes or other transition metal complexes for the polymerization of olefins has widely increased the possibilities in ...
Walter Kaminsky, Mercia Fernandes
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ChemSusChem, Volume 19, Issue 14, 29 July 2026.Hydrocarbon α,ω‐dienes are mainly produced from steam‐cracking derivatives, but high costs, complexity, and environmental impact limit their use. This review highlights sustainable paths from biomass and plastic upcycling, and surveys catalytic transformations into carbocycles and specialty polymers, emphasizing their role as modular building blocks ...
Rosa Villaccio, Giuseppe Leone
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CHIMIA, 1996 The insertion polymerization of propene by using chiral transition metal compounds leads to a variety of poly propene products with different stereoregularities.
Rolf Mülhaupt, Bernhard Rieger
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Journal of Polymer Science, Volume 64, Issue 14, Page 3057-3072, 15 July 2026.This research elucidates the relationship between the molecular structure of commercially available ethylene–propylene copolymers and an ethylene/1‐olefin copolymer and its ability to compatibilize high‐density polyethylene/isotactic polypropylene blends. These findings indicate that the compatibilization of these blends with random copolymers benefits
Bailey Eberle +3 more
wiley +1 more source
South African Journal of Chemical Engineering, 2023 The effect of different prepared magnesium sources including MgCl2 (ZN-THF), metallic magnesium powder (ZN-O), and MGE (ZN-MGE) as the support of titanium-based Ziegler-Natta catalysts on behaviors of gas-phase ethylene/1-hexene copolymerization was ...
Thanyaporn Pongchan +5 more
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Advanced Energy Materials, Volume 16, Issue 25, 1 July 2026.Organic photoelectrochemical cells based on π‐conjugated semiconductors offer a versatile platform for solar fuel generation. This review outlines operating principles, device architectures, and key metrics, and highlights advances in p‐ and n‐type photoelectrodes, interfacial engineering, and catalyst integration.
Jaehyeong Kim +8 more
wiley +1 more source
Ziegler-Natta catalysts for propylene polymerization – Interaction of an external donor with the catalyst [PDF]
Polyolefins Journal, 2016 The interaction of the external donor (propyltrimethoxysilane - PTMS) with titanium-magnesium catalysts (TMCs) containing dibutylphthalate (DBP) as internal donor, which were prepared in different ways, was studied by chemical analysis and infrared ...
Valentina Panchenko +2 more
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