Síntese de catalisadores Ziegler-Natta: algumas rotas e suas dificuldades Synthesis of Ziegler-Natta catalysts: some routes and their difficulties [PDF]
Química Nova, 1997 The Ziegler-Natta catalyst and the polymerization thereof are systems which require careful handling and special treatment of chemicals. In spite of the use of inert atmosphere and dry chemicals, some Ziegler-Natta systems may present low activities or ...
Thaís H. S. Costa +4 more
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Determination of kinetic parameters for ethylene polymerization (with and without hydrogen) by Ziegler-Natta catalyst. [PDF]
Polyolefins Journal, 2020 In this study, slurry polymerization kinetics of ethylene with TiCl4/Mg(OEt)2/AlR3 Ziegler-Natta catalysts in various conditions using the model of sum square error (SSE) (method I) and model of least square error (LSE) (Method II) was investigated.
Seyed Mehdi Ghafelebashi Zaranda +1 more
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Preparation of High-Performance Polyethylene Nanocomposites with Oleic Acid–Siloxene-Supported Ziegler–Natta Catalysts [PDF]
MoleculesThe addition of two-dimensional inorganic nanomaterials can effectively enhance the properties of polyethylene (PE). In the present study, a series of high-performance PE/oleic acid (OA)–siloxene nanocomposites were prepared by in situ polymerization ...
Huan Yue +6 more
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Tailoring aggregation-induced emission in luminescent solar concentrators through controlled polymerization [PDF]
Communications ChemistryLuminescent solar concentrators (LSCs) hold great potential as versatile energy conversion systems for diverse applications. Here, we explore the covalent incorporation of aggregation-induced emission (AIE) luminogens into polymeric backbones for LSCs ...
Elisavet Tatsi +6 more
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Computational Study of Catalytic Poisoning Mechanisms in Polypropylene Polymerization: The Impact of Dimethylamine and Diethylamine on the Deactivation of Ziegler-Natta Catalysts and Co-Catalysts. [PDF]
Polymers (Basel)Fernández JAH +2 more
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The Use of Electron Donors to Increase Stereospecificity in Ziegler-Natta Propylene Polymerization [PDF]
علوم و تکنولوژی پلیمر, 2016 Different chemical components in traditional Ziegler–Natta catalytic system include: (1) titanium and vanadium containing compounds, mostly TiCl4, as an active centre, (2) trialkylaluminium-based Lewis acid compounds, especially triethylaluminium, as ...
Farshid Nouri-Ahangarani +2 more
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Imido-modified SiO2-supported Ti/Mg Ziegler-Natta catalysts for ethylene polymerization and ethylene/1-hexene copolymerization [PDF]
Polyolefins Journal, 2016 A novel imido-modified SiO2-supported Ti/Mg Ziegler-Natta catalyst for ethylene and ethylene/1-hexene polymerization is investigated. The catalyst is prepared by modification of (SiO2/MgO/MgCl2)TiClx Ziegler-Natta catalysts via supporting vanadium ...
Ting Fu +5 more
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Análise de copolímeros de etileno alfa-olefinas por meio de técnicas de fracionamento [PDF]
Polímeros, 2000 Este trabalho apresenta a avaliação da heterogeneidade de resinas comerciais de copolímeros de etileno-1-buteno, produzidas por diferentes processos com catalisadores Ziegler-Natta e de resinas de copolímeros de etileno-1-hexeno sintetizadas em ...
Fernanda F. N. Escher +3 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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Perspektywy Kultury, 2023 Il saggio descrive i preparativi cerimoniali per la visita a Mantova di Enrico di Valois, re della Polonia, nell’agosto del 1574. Il re visitò la città durante il suo viaggio da Cracovia a Lione (18 giugno – 5 settembre 1574), prima di essere incoronato ...
Federica Natta
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