## Abstract Several types of SiO~2~βsupported metallocene catalysts were prepared using chemically modified silica gel. Polymerization of propene was conducted with these catalysts combined with methylaluminoxane (MAO) or ordinary alkylaluminiums. Highly isotactic poly(propylene) with high molecula
Highly isospecific SiO2-supported zirconocene catalyst activated by ordinary alkylaluminiums
β Scribed by Kazuo Soga; Hyun Joon Kim; Takeshi Shiono
- Publisher
- John Wiley and Sons
- Year
- 1994
- Tongue
- English
- Weight
- 202 KB
- Volume
- 15
- Category
- Article
- ISSN
- 1022-1336
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π SIMILAR VOLUMES
## Abstract The effect of various kinds of alkylaluminium on the kinetic parameters of the initial stage of propene polymerization with MgCl~2~βsupported Ziegler catalyst was studied by the stoppedβflow polymerization method. The active sites concentration ([C^\*^]) decreased drastically with the i
Several kinds of dichlorobis( b-diketonato)titanium complexes, i.e., Ti(acetylacetonato) 2 Cl 2 , Ti(1-benzoylacetonato) 2 Cl 2 , Ti(2,2,6,6-tetramethyl-3,5-heptanedionato) 2 Cl 2 and Ti(4,4,4-trifluoro-1-phenyl-1,3-butanedionato) 2 Cl 2 , were synthesized and the corresponding MgCl 2 -supported cat
## Abstract Copolymerizations of ethylene with propene, of ethylene with 1βhexene and of propene with 1βhexene were carried out at 40Β°C under atmospheric pressure with SiO~2~β, Al~2~O~3~β and MgCl~2~βsupported metallocene catalysts using common alkylaluminiums as cocatalyst. From a detailed analysi
The kinetics of ethylene polymerization with TiCl,/MgCl,/SiO, has been investigated in the range of temperatures between 40 and 90Β°C and in the range of ethylene pressures between 4 and 12.4 kg/cm2. The role of MgCI, was discussed from the dependence of the Mg/Ti ratio on the catalytic activity. The