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Relevant bibliographies by topics / Metallocene Catalyst

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Academic literature on the topic 'Metallocene Catalyst'

Author: Grafiati

Published: 4 June 2021

Last updated: 8 February 2022

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Journal articles on the topic "Metallocene Catalyst"

1

Yang, Qing, and Max Paul McDaniel. "Comparison of Support Effects on Phillips and Metallocene Catalysts." Catalysts 11, no. 7 (2021): 842. http://dx.doi.org/10.3390/catal11070842.

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Both metallocene and Phillips chromium catalysts are used in the commercial manufacture of polyethylene. Unlike most other commercial metallocene systems, the Chevron Phillips Chemical (CPC) platform does not use methylaluminoxane or fluoroorganic boranes. Instead, the support itself serves to activate (ionize) the metallocenes, which then polymerize ethylene at high activity. Most of these solid acid supports can also be used to anchor Cr to make a Phillips catalyst. This provides an interesting opportunity to compare the polymerization responses by these two disparate systems, Phillips Cr an

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2

Zhou, Wei, Lei Zhong, and Wei Dong Li. "Progress in Development of Catalyst Systems for Coordinated Polymerization of Olefins." Advanced Materials Research 900 (February 2014): 11–14. http://dx.doi.org/10.4028/www.scientific.net/amr.900.11.

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The research progresses about polyolefin catalyst systems in recent years are summarized. Focusing on the type and properties of the catalytic polymerization of the olefin polymerization catalyst, including typical Ziegler-Natta catalysts, metallocene catalysts and post-transition metal catalyst system. Then the new post-transition metal catalyst is introduced.

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3

Moncada, E., R. Quijada, and P. Zapata. "Modification of Clays by Sol-Gel Reaction and Their Use in the EthyleneIn SituPolymerization for Obtaining Nanocomposites." Journal of Nanomaterials 2012 (2012): 1–7. http://dx.doi.org/10.1155/2012/348156.

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The nanocomposites formation byin situpolymerization used a metallocene catalyst (butyl-2-cyclopentadienyl zirconium 2-chlorines) and a hectorite synthetic clay type which is discussed. This research was carried out in two phases. The first phase consisted of mixing the components of the metallocenic polymerization reaction (metallocene-methylaluminoxane-ethylene) with clay in a reactor. In the second phase, the metallocenic catalytic system was supported by clay particles and then a polymerization reaction was made. In this second phase, the clay particles were modified using a sol-gel reacti

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4

Baek, Jun Won, Su Jin Kwon, Hyun Ju Lee, et al. "Preparation of Half- and Post-Metallocene Hafnium Complexes with Tetrahydroquinoline and Tetrahydrophenanthroline Frameworks for Olefin Polymerization." Polymers 11, no. 7 (2019): 1093. http://dx.doi.org/10.3390/polym11071093.

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Hafnium complexes have drawn attention for their application as post-metallocene catalysts with unique performance in olefin polymerization. In this work, a series of half-metallocene HfMe2 complexes, bearing a tetrahydroquinoline framework, as well as a series of [Namido,N,Caryl]HfMe2-type post-metallocene complexes, bearing a tetrahydrophenanthroline framework, were prepared; the structures of the prepared Hf complexes were unambiguously confirmed by X-ray crystallography. When the prepared complexes were reacted with anhydrous [(C18H37)2N(H)Me]+[B(C6F5)4]−, desired ion-pair complexes, in wh

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5

Marques, Maria, and Rodrigo Tiosso. "Brazilian Mineral Clay as Support for Metallocene Catalyst in the Synthesis of Polyethylene." Chemistry and Chemical Technology 4, no. 2 (2010): 139–46. http://dx.doi.org/10.23939/chcht04.02.139.

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Silica was compared with clays as supports for metallocene. Ethylene homopolymerization with both homogeneous and heterogeneous catalysts was performed. Activation energy was higher for (n-BuCp)2ZrCl2/SiO2/MAO, although high activities were obtained for catalysts with clay. They showed Ea close to that of homogeneous precursor. Catalyst/clay control polymer morphology until 363 K

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6

Chien, James C. W., and Dawei He. "Olefin copolymerization with metallocene catalysts. III. Supported metallocene/methylaluminoxane catalyst for olefin copolymerization." Journal of Polymer Science Part A: Polymer Chemistry 29, no. 11 (1991): 1603–7. http://dx.doi.org/10.1002/pola.1991.080291109.

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7

van Reenen, Albert J., and Omar Sultan. "The Effect of Catalyst Isomerization on Polypropylene Properties." Zeitschrift für Naturforschung B 62, no. 3 (2007): 362–66. http://dx.doi.org/10.1515/znb-2007-0309.

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Two C2-symmetric metallocene catalysts in solution were exposed to light, and the rac-meso conversion followed by NMR spectroscopy. Both exposed and unexposed catalyst solutions were used, in conjunction with a suitable cocatalyst, to polymerize propylene. The polymers were characterized with respect to their microstructure and fractionated according to crystallinity. The relationship between the catalyst isomerization and the polymer structure is illustrated. The effect of pre-activation of the catalyst before exposure to light was also studied and is reported on.

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8

Vieira Marques, Maria de Fátima, Fernanda Constantino Rocha, and Narda Juárez Soto. "Copolymerization of Ethylene/Diene with Different Metallocene Catalysts." Zeitschrift für Naturforschung B 61, no. 11 (2006): 1426–32. http://dx.doi.org/10.1515/znb-2006-1117.

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Copolymerizations of ethylene and 1,7-octadiene were carried out employing homogeneous catalysts Cp2ZrCl2, Ph2C(Flu,Cp)ZrCl2 and Et(Ind)2ZrCl2, and methylaluminoxane as cocatalyst. The polymerization characteristics, such as catalytic activity, polymerization rate, copolymer composition, and thermal properties were examined in relation to the catalyst type. Different comonomer concentrations were employed, and the reaction time was varied, ranging from 1 h up to 4 h, at 90°C and at 0.5 bar ethylene pressure. The results showed that the catalyst Cp2ZrCl2 was more efficient than Et(Ind)2ZrCl2 in

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9

Nguyen, Thanh Thi Le, and Nhon Thi Le Nguyen. "Synthesis of polystyrene-block-poly(iso-butyl vinyl ether) by dinuclear half-metallocene catalyst and atom transfer radical polymerization." Science and Technology Development Journal 18, no. 3 (2015): 189–99. http://dx.doi.org/10.32508/stdj.v18i3.835.

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The synthesis of polystyrene-block-poly(iso-butyl vinyl ether) by using the combination of metallocene catalyst and atom transfer radical polymerization (ATRP) has been tried. This synthetic method takes advantages of both metallocene catalyst to form stereoregular polymer with high activity and ATRP with the controlled molecular weights and low polydispersity. The recent dinuclear half-sandwich complexes of titanium with xylene bridge, [Ti(η5-cyclopentadienyl)Cl2L]2-ortho, meta-[CH2-C6H4-CH2] (L = Cl, L = O-2,6-iPr2C6H3 ) were successfully synthesized. These catalysts were characterized by 1H

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10

Turner, Howard W. "5599761 Ionic metallocene catalyst compositions." Journal of Molecular Catalysis A: Chemical 125, no. 2-3 (1997): 164. http://dx.doi.org/10.1016/s1381-1169(98)80055-1.

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Dissertations / Theses on the topic "Metallocene Catalyst"

1

Taniguchi, Yoshihide, Kazue Kaneko, Teruyoshi Mizutani, and Mitsugu Ishioka. "Space Charge in Low Density Polyethylene Prepared by Metallocene Catalyst." IEEE, 2001. http://hdl.handle.net/2237/7164.

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2

Alsayary, Omar. "Group 4 and Group 10 post metallocene ethylene polymerization catalysis : catalyst structure-polymer properties relationship." Thesis, University of Manchester, 2010. https://www.research.manchester.ac.uk/portal/en/theses/group-4-and-group-10-post-metallocene-ethylene-polymerization-catalysis-catalyst-structurepolymer-properties-relationship(ae5d83a2-4e13-4b8c-b7cc-cf7d67667d3d).html.

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The new ligand L1 [2-[(E)-2,6-diisopropylphenyl-phenyimino]-2H-acenaphthylen-(1E)-ylidene]-(2,4,6-trimethyl-phenyl)-amine was prepared by stepwise addition of 2,6-diisopropylaniline and 2,4,6 trimethylaniline to acenaphthenequinone. The L1NiBr2 complex crystallized as a pseudo tetrahedral monomer, as determined by single crystal X-ray diffraction. This new catalyst L1NiBr2 and 3 related catalysts, bis(2,6-diisopropylphenyl)acenaphthenediimineNiBr2 (L2NiBr2), [(N,N'-bis-(2,6-diisopropylphenyl)-phenanthrene-9,10-diylidendiamineNi-η3-C3H4COOCH3)]+.{B[C6H3(CF3)2]4-} [(L3Ni-η3-C3H4COOCH3)]+.{B[C6H3

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3

Beigzadeh, Daryoosh. "Long-chain branching in ethylene polymerization using combined metallocene catalyst systems." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape3/PQDD_0020/NQ52024.pdf.

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4

Kojo, Shinichi. "Studies on Propylene Polymerization with MgCl_2-Supported TiCl_4 and Metallocene Catalyst Systems." Kyoto University, 1999. http://hdl.handle.net/2433/181329.

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5

Kaneko, K., H. Semi, T. Mizutani, T. Mori, and M. Ishioka. "Charge Transport and Space Charge Formation in Low-Density Polyethylene." IEEE, 2000. http://hdl.handle.net/2237/7177.

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6

Charpentier, Paul A. "Metallocene-catalyzed semi-batch and continuous polymerization of ethylene /." *McMaster only, 1997.

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7

Abdelbagi, Mohamed Elnaiem Mohamed [Verfasser], and Helmut G. [Akademischer Betreuer] Alt. "Synthesis of Bridged and Unbridged Group (lV) Metallocene Complexes as Catalyst Precursors for Ethylene Polymerization / Mohamed Elnaiem Mohamed Abdelbagi. Betreuer: Helmut G. Alt." Bayreuth : Universität Bayreuth, 2011. http://d-nb.info/1059413493/34.

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8

Mäkelä-Vaarne, Nora. "Characterisation of group 4 metallocenes and metallocene catalysts : UV/VIS spectroscopic study." Helsinki : University of Helsinki, 2003. http://ethesis.helsinki.fi/julkaisut/mat/kemia/vk/makela-vaarne/.

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9

Theurkauff, Gabriel. "Investigations on the stereoselective polymerization of α-olefins by single-site group IV metal catalysts". Thesis, Rennes 1, 2014. http://www.theses.fr/2014REN1S158/document.

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Les travaux présentés dans ce manuscrit ont trait à la catalyse de polymérisation des α-oléfines sont présentés en 4 parties distinctes. La première est consacrée à l'étude d'un système catalytique pour la production de polypropylène élastomère. L'analyse poussée des polymères produits et la caractérisation complète des catalyseurs utilisés a permis de montrer la présence de deux homopolymères sous forme de blende. La seconde partie porte sur la copolymérisation de monomères bifonctionnels vinyl-vinylidène avec le propylène. La caractérisation des polymères a permis de révéler la réactivité pa

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10

Diamond, Gary M. "ANSA-bridged and binuclear metallocene compounds of zirconium and hafnium." Thesis, University of Oxford, 1994. http://ora.ox.ac.uk/objects/uuid:297bc125-5270-4969-89c3-69fd326e5c02.

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This thesis describes the synthesis and characterisation of new mononuclear and binuclear zirconium and hafnium compounds containing ansa-bridged ligands. Some olefin polymerization studies, employing the new compounds as catalysts, are also presented. <strong>Chapter 1</strong> begins with an introduction to Ziegler-Natta polymerization of olefins, concentrating on recently developed metallocene-based catalyst systems. The second part of the Chapter charts the development of group 4 ansa-metallocene derivatives, especially their use as stereospecific catalysts. Finally, a review of binuciear

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Books on the topic "Metallocene Catalyst"

1

Burger, Peter. Symmetrisch substituierte C₂-verbrückte ansa-Metallocene. Hartung-Gorre Verlag, 1991.

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2

Sobhanmanesh, K. Copolymerization studies using homogeneous ziegler-natta and metallocene catalysis. UMIST, 1996.

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3

Schäfer, Andrea. Ansa-Metallocene: Enantiomerentrennung und katalytische Aktivität bei der Reduktion von Ketonen. Hartung-Gorre, 1986.

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4

Hamed, O. M. Titanium oxidation states studies in metallocene and ziegler-natta polymerization catalysis. UMIST, 1997.

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5

Przybyla, Christian. [ Alpha]-Olefin-Homo- und Copolymerisation mit trägerfixierten Metallocen-Zieger-Katalysatoren: Kinetische Analyse und Untersuchung des Polymerwachstumsprozesses. Verlag Mainz, 1999.

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6

Naranjo, H. B. Ortega. Studies with ZieglerNatta and Metallocene catalysts for the production of polyethylenes with desirable morphological and structural properties. UMIST, 1995.

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7

M, Benedikt George, and Goodall Brian L, eds. Metallocene-catalyzed polymers: Materials, properties, processing & markets. Plastics Design Library, 1998.

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8

(Editor), George M. Bendikt, and Brian L. Goodall (Editor), eds. Metallocene Catalyzed Polymers: Materials, Processing and Markets (SPE/ PDL Series). Plastics Design Library, 1998.

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9

John, Scheirs, and Kaminsky W. 1941-, eds. Metallocene-based polyolefins: Preparation, properties, and technology. Wiley, 2000.

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10

(Editor), John Scheirs, and Walter Kaminsky (Editor), eds. Volume 2, Metallocene-Based Polyolefins: Preparation, Properties, and Technology. Wiley, 2000.

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Book chapters on the topic "Metallocene Catalyst"

1

Prakash, Nikhil. "Commodity Thermoplastics with Bespoken Properties using Metallocene Catalyst Systems." In Responsive Materials and Methods. John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118842843.ch13.

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2

Ahsan Bashir, M., and Timothy F. L. McKenna. "Reaction Engineering of Polyolefins: The Role of Catalyst Supports in Ethylene Polymerization on Metallocene Catalysts." In Polymer Reaction Engineering of Dispersed Systems. Springer International Publishing, 2017. http://dx.doi.org/10.1007/12_2017_23.

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3

Kashiwa, Norio, Shin-ichi Kojoh, Jun-ichi Imuta, and Toshiyuki Tsutsui. "Characterization of PP prepared with the latest metallocene and MgCl2-supported TiCl4 catalyst systems." In Metalorganic Catalysts for Synthesis and Polymerization. Springer Berlin Heidelberg, 1999. http://dx.doi.org/10.1007/978-3-642-60178-1_3.

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4

Haselwander, Thomas, Stefan Beck, and Hans-Herbert Brintzinger. "Binuclear Titanocene and Zirconocene Cations with μ-Cl- and μ-CH3-Bridges in Metallocene-Based Ziegler-Natta Catalyst Systems—Solution-NMR Studies." In Ziegler Catalysts. Springer Berlin Heidelberg, 1995. http://dx.doi.org/10.1007/978-3-642-79136-9_10.

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5

Soga, Kazuo, Manabu Kaminaka, Hyun Joon Kim, and Takeshi Shiono. "Heterogeneous Metallocene Catalysts." In Ziegler Catalysts. Springer Berlin Heidelberg, 1995. http://dx.doi.org/10.1007/978-3-642-79136-9_18.

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6

Shiono, Takeshi. "Olefin Polymerization with Metallocene Catalysts." In Organometallic Reactions and Polymerization. Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-662-43539-7_1.

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7

Soares, J. B. P., and A. E. Hamielec. "Metallocene Catalysts in Dispersed Media." In Polymeric Dispersions: Principles and Applications. Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-011-5512-0_11.

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8

Lancaster, Simon J., Sean M. O’Hara, and Manfred Bochmann. "Heterogenised MAO-free Metallocene Catalysts." In Metalorganic Catalysts for Synthesis and Polymerization. Springer Berlin Heidelberg, 1999. http://dx.doi.org/10.1007/978-3-642-60178-1_37.

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9

Spaleck, W., M. Antberg, M. Aulbach, et al. "New Isotactic Polypropylenes via Metallocene Catalysts." In Ziegler Catalysts. Springer Berlin Heidelberg, 1995. http://dx.doi.org/10.1007/978-3-642-79136-9_5.

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10

Kokko, Esa, Petri Lehmus, Anneli Malmberg, Barbro Löfgren, and Jukka V. Seppälä. "Long-Chain Branched Polyethene via Metallocene-Catalysis: Comparison of Catalysts." In Organometallic Catalysts and Olefin Polymerization. Springer Berlin Heidelberg, 2001. http://dx.doi.org/10.1007/978-3-642-59465-6_29.

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Conference papers on the topic "Metallocene Catalyst"

1

"Fractionation and Crystallization of Isotactic Polypropylenes Prepared Using Homogenous Metallocene Catalyst." In International Conference on Advances in Science, Engineering, Technology and Natural Resources. International Institute of Chemical, Biological & Environmental Engineering, 2015. http://dx.doi.org/10.15242/iicbe.c0815043.

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2

Li, Kuo-Tseng, and Cheng-Ni Yang. "Synthesis of uniform rod-like polymer particles via propylene polymerization using metallocene catalysts supported on Stober silica." In MATERIALS CHARACTERIZATION USING X-RAYS AND RELATED TECHNIQUES. Author(s), 2019. http://dx.doi.org/10.1063/1.5088275.

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