About: Copolymerisation of ethylene with styrene using CGC Catalyst: The effect of cyclopentadienyl ligand substitution on the Catalyst Activity and Copolymer Structure

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About: Copolymerisation of ethylene with styrene using CGC Catalyst: The effect of cyclopentadienyl ligand substitution on the Catalyst Activity and Copolymer Structure Goto Sponge NotDistinct Permalink

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	n/a (cs) A new class of highly active catalysts for polyalkene production emerged with the synthesis of (tert-butylamido)dimethyl(2,3,4,5-tetramethylcyclopentadienyl)silane as the h5:h1(N)-dianionic ligand and, subsequently, ansa-{h5:h1(N)-((tert-butylamido)dimethyl(2,3,4,5-tetramethylcyclopentadienyl)silane}dichlorotitanium(IV). These catalysts, called %22constrained geometry catalysts%22 (CGC), arise from mixing of the amidocyclopentadienyl-titanium with excess methylalumoxane (MAO). Compared to titanocene or zirconocene-based single-site catalysts the latter provide more acidic and less sterically encumbered cationic centres and, consequently, display very high activities in the polymerisation of ethene, propene and in copolymerizations of ethene with terminal alkenes, cycloalkenes and styrene. In attempts to tune the polymerisation properties the parent CGC complex was modified by replacing the cyclopentadienyl ligand by indenyl or fluorenyl ligands, and their rings as well as the amide groups were variously A new class of highly active catalysts for polyalkene production emerged with the synthesis of (tert-butylamido)dimethyl(2,3,4,5-tetramethylcyclopentadienyl)silane as the h5:h1(N)-dianionic ligand and, subsequently, ansa-{h5:h1(N)-((tert-butylamido)dimethyl(2,3,4,5-tetramethylcyclopentadienyl)silane}dichlorotitanium(IV). These catalysts, called %22constrained geometry catalysts%22 (CGC), arise from mixing of the amidocyclopentadienyl-titanium with excess methylalumoxane (MAO). Compared to titanocene or zirconocene-based single-site catalysts the latter provide more acidic and less sterically encumbered cationic centres and, consequently, display very high activities in the polymerisation of ethene, propene and in copolymerizations of ethene with terminal alkenes, cycloalkenes and styrene. In attempts to tune the polymerisation properties the parent CGC complex was modified by replacing the cyclopentadienyl ligand by indenyl or fluorenyl ligands, and their rings as well as the amide groups were variously (en)
Title	n/a (cs) Copolymerisation of ethylene with styrene using CGC Catalyst: The effect of cyclopentadienyl ligand substitution on the Catalyst Activity and Copolymer Structure Copolymerisation of ethylene with styrene using CGC Catalyst: The effect of cyclopentadienyl ligand substitution on the Catalyst Activity and Copolymer Structure (en)
skos:prefLabel	n/a (cs) Copolymerisation of ethylene with styrene using CGC Catalyst: The effect of cyclopentadienyl ligand substitution on the Catalyst Activity and Copolymer Structure Copolymerisation of ethylene with styrene using CGC Catalyst: The effect of cyclopentadienyl ligand substitution on the Catalyst Activity and Copolymer Structure (en)
skos:notation	RIV/00216224:14330/03:00011170!RIV/2005/AV0/143305/N
http://linked.open.../vavai/riv/strany	12-13
http://linked.open...avai/riv/aktivita	P
http://linked.open...avai/riv/aktivity	P(IBS4040017)
http://linked.open...vai/riv/dodaniDat	2005
http://linked.open...aciTvurceVysledku	Skeřil, Robert
http://linked.open.../riv/druhVysledku	D - Článek ve sborníku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Masarykova univerzita / Fakulta informatiky
http://linked.open...dnocenehoVysledku	602261
http://linked.open...ai/riv/idVysledku	RIV/00216224:14330/03:00011170
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	CGC, ethylene, styrene, copolymer (en)
http://linked.open.../riv/klicoveSlovo	CGC ethylene copolymer styrene
http://linked.open...ontrolniKodProRIV	[A3698B23A09D]
http://linked.open...v/mistoKonaniAkce	J. Heyrovsky Institute, Prague
http://linked.open...i/riv/mistoVydani	Prague
http://linked.open...i/riv/nazevZdroje	XXXV Symposium On Catalysis
http://linked.open...in/vavai/riv/obor	CD
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	2 (xsd:int)
http://linked.open...vavai/riv/projekt	Metallocene catalysts anchored on mesoporous support of the MCM-41 type
http://linked.open...UplatneniVysledku	2003
http://linked.open...iv/tvurceVysledku	Skeřil, Robert Salajka, Zdeněk
http://linked.open...vavai/riv/typAkce	EUR - Evropská
http://linked.open.../riv/zahajeniAkce	2003-01-01 (xsd:date)
number of pages	95 (xsd:int)
http://purl.org/ne...btex#hasPublisher	Ústav fyzikální chemie J. Heyrovského AV ČR
http://localhost/t...ganizacniJednotka	14330

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