Results 11 to 20 of about 630 (116)

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

Effects of various poisoning compounds on the activity and stereospecificity of heterogeneous Ziegler–Natta catalyst [PDF]

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.
Kitti Tangjituabun et al
doaj   +2 more sources

Characterization of phthalate internal donor in MgCl2 supported Ziegler-Natta catalyst by solid state 13C NMR [PDF]

open access: yesPolyolefins Journal, 2022
Ziegler-Natta catalyst for propylene polymerization, which TiCl4 and di-alkyl phthalate were supported on MgCl2, was analyzed by solid state 13C NMR. It was confirmed that the spin-lattice relaxation time (“relaxation time” hereafter) of carbonyl group ...
Masayoshi Saito   +4 more
doaj   +1 more source

POLYMERIZATION OF STYRENE USING ZIEGLER – NATTA CATALYST TYPE TICL4/MGCL2 – EB /ALET3 [PDF]

open access: yesمجلة جامعة الانبار للعلوم الصرفة, 2013
In this study Ziegler – Natta catalyst was prepared which is a multi component catalytic system composed of, titaniumtetrachloride (TiCl4) as a active material, anhydrous magnesium chloride MgCl2 as support (carrier) which distribute the active material,
AYAD A. UTTAR, ALI S. ABED
doaj   +1 more source

In situ stabilization of polypropylene by lignin using a Ziegler-Natta catalyst [PDF]

open access: yesPolyolefins Journal, 2014
A fourth-generation Ziegler-Natta catalyst was prepared to synthesize polypropylene (PP), which was stabilized by in situpolymerization employing lignin as antioxidant.
Maria Marques   +3 more
doaj   +1 more source

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   +1 more source

Determination of Optimal Reaction Temperature and Hydrogen Amount for Propylene Polymerization by a Mathematical Model [PDF]

open access: yesKemija u Industriji, 2019
Regarding the complexity of Ziegler-Natta catalyst kinetics in polypropylene polymerization, so far, there is no adequate model to determine the best process conditions for predicting average molecular weight and dispersity as the most crucial final ...
Gholam Hossain Varshouee   +3 more
doaj   +1 more source

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   +1 more source

Effects of Important Operating Parameters on Product Properties and Operation of HDPE Slurry Reactor [PDF]

open access: yesعلوم و تکنولوژی پلیمر, 2007
In this article, a complete model for the mixed flow slurry reactor for polymerization of ethylene to high density polyethylene in the presence of Ziegler-Natta catalyst is presented. In addition to the effects of the multiple active sites, the effect of
M. Soltanieh   +3 more
doaj   +1 more source

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