Results 1 to 10 of about 117,309 (167)

The Use of Electron Donors to Increase Stereospecificity in Ziegler-Natta Propylene Polymerization [PDF]

open access: yesعلوم 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
doaj   +2 more sources

Dataset of energetically accessible structures of MgCl2/TiCl4 clusters for Ziegler-Natta catalysts [PDF]

open access: yesData in Brief, 2021
This data article provides a dataset of the energetically accessible structures including the most stable structures of xMgCl2/yTiCl4 nanoplates (x = 6–19, y = 0–4).
Gentoku Takasao   +5 more
doaj   +2 more sources

High Melting Point of Linear, Spiral Polyethylene Nanofibers and Polyethylene Microspheres Obtained Through Confined Polymerization by a PPM‐Supported Ziegler‐Natta Catalyst [PDF]

open access: yesChemistryOpen, 2020
In this work, different types of polyethylene (linear, spiral nanofibers and microspheres) were obtained via confined polymerization by a PPM‐supported Ziegler‐Natta catalyst.
Dr. Yu Xiao   +3 more
doaj   +2 more sources

Preparation of High-Performance Polyethylene Nanocomposites with Oleic Acid–Siloxene-Supported Ziegler–Natta Catalysts [PDF]

open access: yesMolecules
The 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
doaj   +2 more sources

Síntese de catalisadores Ziegler-Natta: algumas rotas e suas dificuldades Synthesis of Ziegler-Natta catalysts: some routes and their difficulties

open access: yesQuímica 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
doaj   +2 more sources

Synthesizing polypropylene with percolation network catalyzed by inorganic nanoparticles-functionalized Ziegler-Natta catalyst [PDF]

open access: yesPolyolefins Journal
Polypropylene is one of the most widely used synthetic resins, which is mainly synthesized with Ziegler-Natta catalysts. In this paper, the functionalized Ziegler-Natta catalyst is applied to prepare high-performance polypropylene.
Tingting Yang   +3 more
doaj   +3 more sources

CATALIZADORES Ziegler-Natta utilizados para polimerizar propileno y etileno [PDF]

open access: yesRevista de Química, 1987
A 35 años de su descubrimiento, la polimerización del propileno y etileno es hoy en día uno de los mayores procesos industriales. Se comienza con una breve reseña histórica, para luego resaltar las estructuras, propiedades y usos del polipropileno y ...
Carlos A. Castro   +2 more
doaj   +2 more sources

Effects of Various Poisoning Compounds on the Activity and Stereospecificity of Heterogeneous Ziegler–Natta Catalyst

open access: yesScience and Technology of Advanced Materials, 2008
A TiCl4/ethylbenzoate/MgCl2 Ziegler–Natta catalyst was pretreated with chemically different poisoning compounds to investigate their effects on the catalyst activity and stereospecificity for propylene polymerization.
Piyasan Praserthdam   +2 more
exaly   +2 more sources

Imido-modified SiO2-supported Ti/Mg Ziegler-Natta catalysts for ethylene polymerization and ethylene/1-hexene copolymerization [PDF]

open access: yesPolyolefins 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
doaj   +1 more source

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