Ethylene polymerization
Investigation of Alkoxysilanes in the Presence of Hydrogen with Ziegler Natta Catalysts in Ethylene Polymerization
... various polymerization conditions ...of ethylene polymerization, but it increases rate of propylene polymerization for ZN catalyst [3, ...in ethylene/1-hexene copolymerization in the ...
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Effects of Temperature and Cocatalyst Concentration on the Number of Active Sites in a TiCl4/Mg(OEt)2 Catalyst for Ethylene Polymerization
... slurry polymerization of ethylene was studied by employing a (TiCl 4 /Mg(OEt) 2 /TEA) catalyst system in ...for ethylene polymerization was evaluated as a function of Al/Ti molar ratio and ...
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The effect of iodo substituents in bis(phenoxyimine) zirconium complexes on the catalytic performance of homogeneous ethylene polymerization reactions
... E ight different zirconium phenoxyimine complexes were synthesized, characterized and tested as catalysts for ethylene polymerization. The phenoxyimine compounds were prepared by condensation of substituted ...
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IN SITU SILICA SUPPORTED METALLOCENE CATALYSTS FOR ETHYLENE POLYMERIZATION
... method and used for ethylene polymerization. In this method, the step of catalyst loading on support was eliminated and common alkyl aluminum (triisobutylaluminum, TiBA) cocatalyst was used instead of ...
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VLDPE Synthesis by Radical Ethylene Polymerization in Tubular Reactors–Negative Factor or Unrealized Opportunities
... It is significantly due to the development of the various ethylene polymerization processes and copolymerization with other monomers using wide-ranging initiating and catalytic systems. That provided a ...
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Titanasilsesquioxane Alkylaluminum Catalyst System for Ethylene Polymerization
... Catalytic ethylene polymerization was carried out in a 100 ml stirred autoclave (Model 4593 Parr, USA) con- nected to a process controller (model 4871) and operated through the microprocessor controller ...
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Kinetics of ethylene polymerization over titanium-magnesium catalysts: The reasons for the observed second order of polymerization rate with respect to ethylene
... that ethylene acts as a coordinated ligand of an active ...of ethylene polymerization over metallocene catalysts and has put forward a hypothesis that a complex may be formed between one or two ...
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Ti (IV) complexes of some heterocyclic ligands. Synthesis, characterization and ethylene polymerization activity
... Mononuclear transition metal complexes with hetero atoms in the ligand system can offer a big advantage. After activation with MAO, more than one active center can be generated and as a consequence bimodal or multimodal ...
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Phillips catalysts synthesized over various silica supports: Characterization and their catalytic evaluation in ethylene polymerization
... catalyst. Ethylene polymerization was carried out in the slurry phase using Phillips catalyst based on silica materials such as silica aerogel, SiO 2 (G 643), and titanium modified SiO 2 (G 643), and the ...
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N-heterocyclic carbene ligands for nickel ethylene polymerization catalysts: toward the incorporation of polar comonomers
... As discussed in Chapter 1, the two major developments in late metal-catalyzed olefin polymerization were the discovery of neutral Ni catalysts by our group 2 and others 3 and cationic Ni and Pd diimine catalysts ...
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Dissymmetric dinuclear transition metal complexes as dual site catalysts for the polymerization of ethylene
... the polymerization of ...in polymerization activities was: Ni>Pd>V>Zr>Ti. The ethylene polymerization activities of the dinuclear catalysts were almost double the activities of ...
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Synthesis of high molecular weight polyethylene using FI catalyst
... living ethylene and propylene polymerizations, resulting in the formation of functionalized polymers and block copolymers from ethylene ...studied ethylene polymerization via ...
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Comparison of Activity of Ziegler Natta Catalysts Prepared by Recrystallization and Chemical Reaction Methods towards Polymerization of Ethylene
... Ethylene polymerization was carried out in a 100-ml semi-batch stainless steel autoclave reactor equipped with a magnetic ...to polymerization temperature (80 o C). Polymerization was stated ...
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Polymerization of methyl acrylate and as comonomer with ethylene using single-site catalysts
... active polymerization centers formed in the ...of ethylene and PMA. In the polymerization of methyl acrylate a coordinative bond is formed between the metal and carbonyl ...the ethylene ...
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Influence of diethyl zinc on ethylene-norbornene copolymerization
... the ethylene polymerization, the endotherm peak showed bimodal profile, which indicated that alkyd chain transfer of Zn to the active sites occurred and the polymer chain continued to ...
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Polymerization-Induced Self-Assembly of All-Acrylic Diblock Copolymers via RAFT Dispersion Polymerization in Alkanes
... Many PISA syntheses are described in the literature: such formulations are commonly conducted via emulsion 53−60 or dispersion polymerization in either aqueous 61−71 or alcoholic media. 42,72−88 However, there are ...
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SYNTHESIS, CHARACTERIZATION AND CHELATING PROPERTIES OF POLY[AZO (1 NAPTHOL)]
... To a solution of 4, 6 – dinitro resorcinol (17.0 gms, 0.1 mole) in tri ethylene glycol (Trigol) (150 ml), KOH (44.8 gm, 0.8 mole) was added gradually and stirred well at room temperature up to complete dissolution ...
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Ethylene-forming enzyme and bioethylene production
... gene, ethylene pro- duction was stable over 30 generations ...of ethylene production that were four times higher than in strains containing the integrated kanamycin resistance gene [24], exhibiting rates ...
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Development of Tantalum Phenoxy-Imine Compounds for Selective Ethylene Oligomerization
... and ethylene with a substantially lower rate of dimerization with ...case, ethylene forms more stable metallocycles when it inserts, and as such is less prone to ring contraction and generation of ...
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Novel Poly(ethylene oxide) Grafted Polycarbazole Conjugated Freestanding Network Films via Anionic and Electrochemical Polymerization
... ITO transparent electrode were examined carefully, as shown in Fig. 4. The EPC showed several characteristic absorption peaks at 292, 326, and 340 nm (Fig. 4A), which were assigned to a single- electron π-π* transition ...
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