Synthesizing polypropylene with percolation network catalyzed by inorganic nanoparticles-functionalized Ziegler-Natta catalyst [PDF]
Polyolefins JournalPolypropylene 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
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
doaj +2 more sources
Crystal Structures of Ziegler–Natta Catalyst Supports
Chemistry – A European Journal, 2011 AbstractThe crystal structures of three MgCl2⋅n EtOH complexes with n=1.5, 2.8, and 3.3 have been fully determined. Such complexes are the fundamental precursors for Ziegler–Natta polymerization catalysts used to produce polyolefins on a multimillion‐ton scale worldwide.
Malizia F., Fait A., CRUCIANI, Giuseppe
openaire +3 more sources
Fine Tuning of Catalyst Active Sites to Access Advanced Ultrahigh-Melting Polyolefins. [PDF]
Angew Chem Int Ed EnglA redesign of the active site of the pyridylamido hafnium (Hf) catalysts can enhance the performance of this catalyst family and unlock previously inaccessible polymer structures. When the catalyst is precontacted with allyltrimethylsilane the active species is modified and the catalyst experiences a new life becoming able to polymerize sterically ...
De Stefano F +3 more
europepmc +3 more sources
MgCl₂-Supported Titanium Ziegler-Natta Catalyst Using Carbon Dioxide-Based Poly(propylene ether carbonate) Diols as Internal Electron Donor for 1-Butene Polymerization. [PDF]
Polymers (Basel), 2017 MgCl2-supported titanium Ziegler-Natta catalyst containing CO2-based poly(propylene ether carbonate) diols as a potential internal electron donor (IED) was synthesized and employed for 1-butene polymerization.
Cui X, Bai Q, Ma K, Yang M, Liu B.
europepmc +2 more sources
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
doaj +1 more source
A Study on the Effect of Catalyst Types on Microstructure of Ethylene/1-Hexene Copolymer by Thermal Fractionation [PDF]
علوم و تکنولوژی پلیمر, 2015 Olefinic copolymers of ethylene/1-hexene were synthesized by three main types of supported catalysts, including Philips, Ziegler-Natta and metallocene catalysts, and the specific microstructural features delivered by each class of the catalysts were ...
Seyed Mohammad Mehdi Mortazavi
doaj +1 more source
Preactive Site in Ziegler–Natta Catalysts [PDF]
The Journal of Physical Chemistry C, 2019 Ziegler–Natta catalysts are one of the most important industrial catalysts for the production of isotactic polypropylene, yet they are still not properly understood at the molecular level.
E. S. (Merijn) Blaakmeer +4 more
openaire +2 more sources
System Identification for Experimental Study for Polymerization Catalyst Reaction in Fluidized Bed [PDF]
, 2011 In this work, system identification method is used to capture the reactor characteristics of production rate of polyethylene (PE) based on published experimental data. The identification method is used to measure the percentage effect on the production
Ahmmed S. Ibrehem, Ibrehem, A. S.
core +2 more sources
A Mathematical Model for Investigating the Effect of Reaction Temperature and Hydrogen Amount on the Catalyst Yield during Propylene Polymerization [PDF]
Kemija u Industriji, 2019 In this study, the effect of reaction temperature and hydrogen amount, as the most effective process variables on the Ziegler-Natta catalysts yield during propylene polymerization, was investigated with the aid of a validated mathematical model.
Gholam Hossain Varshouee +3 more
doaj +1 more source