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| Description
| - The characteristics of the cationic Ni-diphosphine azine complexes of general formula [NiX(PR2CH2C(But)=NN=C(But)CH2PR2)]+ {X=Br, R=cyclohexyl (cy), iso-propyl (Pri), tert-butyl (But), phenyl (Ph); X=Cl or I, R=cyclohexyl) as catalysts for the polymerization of ethylene were evaluated in the presence or absence of co-catalysts such as MAO, DEAC, TMA, or TIBA. The best results were obtained with MAO. The ability of the complexes to generate active catalysts is strongly influenced by the characteristics of the halogen co-ligand and by the nature of the R group at the phosphine azine ligand. The best catalyst is [NiBr{PCy2CH2C(But)=NN=C(But)CH2PCy2}]Br activated by MAO. The polymers obtained showed by by 1H and 13C NMR and DSC to be formed by branched polyethylenes, the number of branches increased with the temperature at which the polymerization took place. The molecular weight of the polymeric material was tentatively estimated from the NMR spectra.
- The characteristics of the cationic Ni-diphosphine azine complexes of general formula [NiX(PR2CH2C(But)=NN=C(But)CH2PR2)]+ {X=Br, R=cyclohexyl (cy), iso-propyl (Pri), tert-butyl (But), phenyl (Ph); X=Cl or I, R=cyclohexyl) as catalysts for the polymerization of ethylene were evaluated in the presence or absence of co-catalysts such as MAO, DEAC, TMA, or TIBA. The best results were obtained with MAO. The ability of the complexes to generate active catalysts is strongly influenced by the characteristics of the halogen co-ligand and by the nature of the R group at the phosphine azine ligand. The best catalyst is [NiBr{PCy2CH2C(But)=NN=C(But)CH2PCy2}]Br activated by MAO. The polymers obtained showed by by 1H and 13C NMR and DSC to be formed by branched polyethylenes, the number of branches increased with the temperature at which the polymerization took place. The molecular weight of the polymeric material was tentatively estimated from the NMR spectra. (en)
- Byly zhodnoceny vlastnosti komplexů [NiX(PR2CH2C(But)=NN=C(But)CH2PR2)]+ (kde X = Br a R = cyklohexyl (Cy), isopropyl (Pri), tert-butyl (But), fenyl (Ph); X = Cl nebo I a R = cyklohexyl) jako katalyzátorů pro polymerizaci ethylenu bez nebo s kokatalyzátory methylaluminoxan (MAO), diethylaluminiumchlorid, trimethylaluminium nebo tri(isobutyl)aluminium. Nejlepší výsledky byly získány s [NiBr(PCy2CH2C(But)=NN=C(But)CH2PCy2)]Br aktivovaným MAO (A = 25.8 kg (mol Ni)-1 bar-1 h-1). Polymery byly charakterizovány NMR a diferenciální skenovací kalorimetrií jako větvené polyethyleny, počet větvení se zvyšoval s teplotou polymerace. Molekulové hmotnosti polymerů byly odhadnuty s pomocí NMR. Návrh aktivního prekurzoru katalyzátoru byl u činěn na základě experimentálních dat a MO výpočtů. (cs)
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| Title
| - Ethylene Polymerisation by Ni-Diphosphine Azine Complexes
- Polymerace ethylenu N-difosfinoazinovými komplexy (cs)
- Ethylene Polymerisation by Ni-Diphosphine Azine Complexes (en)
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| skos:prefLabel
| - Ethylene Polymerisation by Ni-Diphosphine Azine Complexes
- Polymerace ethylenu N-difosfinoazinovými komplexy (cs)
- Ethylene Polymerisation by Ni-Diphosphine Azine Complexes (en)
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| skos:notation
| - RIV/67985858:_____/07:00096228!RIV08-AV0-67985858
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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
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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
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| http://linked.open...ai/riv/idVysledku
| - RIV/67985858:_____/07:00096228
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| http://linked.open...riv/jazykVysledku
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| http://linked.open.../riv/klicovaSlova
| - polymerization; ethylene; catalysis (en)
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| http://linked.open.../riv/klicoveSlovo
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| http://linked.open...odStatuVydavatele
| - GB - Spojené království Velké Británie a Severního Irska
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| http://linked.open...ontrolniKodProRIV
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| http://linked.open...i/riv/nazevZdroje
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| http://linked.open...in/vavai/riv/obor
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| http://linked.open...ichTvurcuVysledku
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| http://linked.open...cetTvurcuVysledku
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| http://linked.open...UplatneniVysledku
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| http://linked.open...v/svazekPeriodika
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| http://linked.open...iv/tvurceVysledku
| - Čermák, Jan
- Carvalho, M. F. N. N.
- Galvao, A. M.
- Matos, I.
- Fernandes, A. C.
- Ferreira, A. S.
- Marques, M. M.
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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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