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
Synthesis of Isotactic Polybutene-1 with Ziegler-Natta Catalyst [PDF]
علوم و تکنولوژی پلیمر, 2022 Hypothesis: Butene-1 is in excess in the polyolefin plants of Iran. Considering the properties of isotactic polybutene-1, including high creep and environmental stress cracking resistances, excellent elastic reversibility and good chemical abrasion ...
shokoufeh Hakim +2 more
doaj +1 more source
Validation of BET Specific Surface Area for Heterogeneous Ziegler-Natta Catalysts based on α_S-plot [PDF]
, 2012 Specific surface area based on the BET method in N_2 adsorption has historically posed poor correlation with olefin polymerization activity of heterogeneous Ziegler-Natta (ZN) catalysts.
Taniike, Toshiaki +4 more
core +1 more source
Immobilizing metallocene by solid polymethylaluminoxane “sMAO” for slurry-phase ethylene-1-hexene copolymerization [PDF]
MATEC Web of Conferences, 2022 In the field of olefin catalytic polymerization, metallocene catalysts show higher activity than traditional Ziegler-Natta catalysts. In this study, benzoic acid catalyzed the controlled hydrolysis of trimethylaluminum (TMA) to methylaluminoxane (MAO ...
Wu Chaofan +5 more
doaj +1 more source
MgO/MgCl_2/TiCl_4 Core-Shell Catalyst for Establishing Structure-Performance Relationship in Ziegler-Natta Olefin Polymerization [PDF]
, 2014 Recently we successfully established the first structure-performance relationships between the catalyst surface area and propylene polymerization activity using novel MgO/MgC_l2/TiCl_4 core-shell catalysts with non-porous and non-fragmentable features ...
Taniike, Toshiaki +3 more
core +1 more source
Structure-Performance Relationship in Ziegler-Natta Olefin Polymerization with Novel Core-Shell MgO/MgCl_2/TiCl_4 Catalysts [PDF]
, 2012 The impact of support architectures on the olefin polymerization performance of heterogeneous Ziegler–Natta catalysts has been scarcely understood due to the complexity of pore system and the fragmentation-induced structural changes during polymerization.
Taniike, Toshiaki +2 more
core +1 more source
Coadsorption Model for First-Principle Description of Roles of Donors in Heterogeneous Ziegler-Natta Propylene Polymerization [PDF]
, 2012 Systematic periodic density functional calculations were conducted to clarify the mechanism for donors to exert steric and electronics influences on propylene polymerization using heterogeneous Ziegler–Natta catalysts.
Taniike, Toshiaki, Terano, Minoru
core +1 more source
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 +1 more source
Effects of Ti oxidation state on ethylene, 1-hexene comonomer polymerization by MgCl_2-supported Ziegler–Natta catalysts [PDF]
, 2011 In this work, the influences of the Ti oxidation state on the catalytic properties of MgCl_2-supported Ziegler–Natta catalysts in ethylene homo- and co-polymerization with 1-hexene. Three catalysts having different Ti oxidation states were synthesized by
Taniike, Toshiaki +9 more
core +1 more source
Characterization of phthalate internal donor in MgCl2 supported Ziegler-Natta catalyst by solid state 13C NMR [PDF]
Polyolefins 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