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| Description
| - The ethene-styrene copolymerization has been investigated using the dimethylsilylene-bridged (amidocyclopentadienyl)dichlorotitanium(IV) complexes [TiCl2 eta 5-1-(t-BuSiMe2N-.kappa.N)-2,3,4-Me3-5-R-C5] where R = Me (1), H (2), Bu (3), Ph (4), 4 fluorophenyl (5), and but-2-en-2-yl (6) in combination with methylalumoxane (MAO) as catalysts. The nature of the substituent R strongly influenced the catalyst activity and selectivity and the copolymer microstructure and molecular weight. The catalysts derived from 1 3 were by about one order more active than those derived from 4 6. At the optimum Al/Ti molar ratio 900, the highly active catalysts produced a pseudo random copolymer (95-97 wt %) containing up to 47.8 mol % of incorporated styrene. The low-active catalysts gave mixtures of a pseudo-random copolymer (76 - 85 wt %) with polyethene (10 wt %) and polystyrene sequences (3 - 7 wt %). The X-ray diffraction crystal structures of 2 and 4 were determined.
- The ethene-styrene copolymerization has been investigated using the dimethylsilylene-bridged (amidocyclopentadienyl)dichlorotitanium(IV) complexes [TiCl2 eta 5-1-(t-BuSiMe2N-.kappa.N)-2,3,4-Me3-5-R-C5] where R = Me (1), H (2), Bu (3), Ph (4), 4 fluorophenyl (5), and but-2-en-2-yl (6) in combination with methylalumoxane (MAO) as catalysts. The nature of the substituent R strongly influenced the catalyst activity and selectivity and the copolymer microstructure and molecular weight. The catalysts derived from 1 3 were by about one order more active than those derived from 4 6. At the optimum Al/Ti molar ratio 900, the highly active catalysts produced a pseudo random copolymer (95-97 wt %) containing up to 47.8 mol % of incorporated styrene. The low-active catalysts gave mixtures of a pseudo-random copolymer (76 - 85 wt %) with polyethene (10 wt %) and polystyrene sequences (3 - 7 wt %). The X-ray diffraction crystal structures of 2 and 4 were determined. (en)
- Kopolymerizace ethylenu se styrenem na CGC katalyzátorech: efekt substituce na cyklopentadienylovém ligandu na katalytickou aktivitu a strukturu kopolymeru. Abstrakt: Kopolymerizace ethylenu se styrenem byla zkoumána na katalyzátorech vzniklých mísením komplexů [TiCl2 eta 5-1-(SiMe2Nt-Bu-?N)-2,3,4-Me3-5-R-C5] kde R = Me (1), H (2), Bu (3), Ph (4), 4 fluorofenyl (5), a but-2-en-2-yl (6) s methylalumoxanem (MAO). Povaha substituentu R ovlivňovala katalytickou aktivitu, selektivitu, mikrostrukturu kopolymeru a jeho molekulovou váhu. Katalyzátory vzniklé z komplexů 1-3 vykazovaly o řád větší aktivitu než katalyzátory vzniklé z komplexů 4-6. Při optimálním molárním poměru Al/Ti 900, nejvíce aktivní katalyzátor produkoval kopolymer (95-97 wt %) obsahující až 47.8 mol % styrenu. Katalyzátor s nejnižší aktivitou produkoval směs kopolymeru (76-85 wt %) s polyethylenem (10 wt %) a polystyrenovými sekvencemi (3-7 wt %). (cs)
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| Title
| - Copolymerization of Ethene with Styrene Using CGC Catalysts. The Effect of the Cyclopentadienyl Ligand Substitution on the Catalyst Activity and Copolymer Structure
- Kopolymerizace ethylenu se styrenem na CGC katalyzátorech: efekt substituce na cyklopentadienylovém ligandu na katalytickou aktivitu a strukturu kopolymeru (cs)
- Copolymerization of Ethene with Styrene Using CGC Catalysts. The Effect of the Cyclopentadienyl Ligand Substitution on the Catalyst Activity and Copolymer Structure (en)
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| skos:prefLabel
| - Copolymerization of Ethene with Styrene Using CGC Catalysts. The Effect of the Cyclopentadienyl Ligand Substitution on the Catalyst Activity and Copolymer Structure
- Kopolymerizace ethylenu se styrenem na CGC katalyzátorech: efekt substituce na cyklopentadienylovém ligandu na katalytickou aktivitu a strukturu kopolymeru (cs)
- Copolymerization of Ethene with Styrene Using CGC Catalysts. The Effect of the Cyclopentadienyl Ligand Substitution on the Catalyst Activity and Copolymer Structure (en)
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| skos:notation
| - RIV/61388955:_____/04:00107623!RIV/2005/AV0/A54005/N
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| http://linked.open.../vavai/riv/strany
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| http://linked.open...avai/riv/aktivita
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| http://linked.open...avai/riv/aktivity
| - P(GA203/02/0436), P(IBS4040017), P(LN00B142), Z(AV0Z4040901)
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| http://linked.open...iv/cisloPeriodika
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| http://linked.open...vai/riv/dodaniDat
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| http://linked.open...aciTvurceVysledku
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| http://linked.open.../riv/druhVysledku
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| http://linked.open...iv/duvernostUdaju
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| http://linked.open...titaPredkladatele
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| http://linked.open...dnocenehoVysledku
| |
| http://linked.open...ai/riv/idVysledku
| - RIV/61388955:_____/04:00107623
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| http://linked.open...riv/jazykVysledku
| |
| http://linked.open.../riv/klicovaSlova
| - titanium; constrained geometry catalysts; crystal structures (en)
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| http://linked.open.../riv/klicoveSlovo
| |
| http://linked.open...odStatuVydavatele
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| http://linked.open...ontrolniKodProRIV
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| http://linked.open...i/riv/nazevZdroje
| - Journal of Molecular Catalysis
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| http://linked.open...in/vavai/riv/obor
| |
| http://linked.open...ichTvurcuVysledku
| |
| http://linked.open...cetTvurcuVysledku
| |
| http://linked.open...vavai/riv/projekt
| |
| http://linked.open...UplatneniVysledku
| |
| http://linked.open...v/svazekPeriodika
| |
| http://linked.open...iv/tvurceVysledku
| - Císařová, I.
- Mach, Karel
- Pinkas, Jiří
- Horáček, Michal
- Varga, V.
- Šindelář, P.
- Salajka, Z.
- Skeřil, R.
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| http://linked.open...n/vavai/riv/zamer
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| issn
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| number of pages
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