Isospecific polymerization of styrene with supported nickel acetylacetonate/methylaluminoxane catalysts
β Scribed by Marcos L. Dias; Geraldo L. Crossetti; Carlotta Bormioli; Antonino Giarusso; Luiz Claudio de Santa Maria; Fernanda M. B. Coutinho; Lido Porri
- Publisher
- Springer
- Year
- 1998
- Tongue
- English
- Weight
- 93 KB
- Volume
- 40
- Category
- Article
- ISSN
- 0170-0839
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π SIMILAR VOLUMES
## Abstract Syndiotactic polystyrene was efficiently prepared in the presence of a homogeneous catalyst composed of (Ξ·^5^βcyclopentadienyl)tribenzyloxytitanium and methylaluminoxane (MAO) as a cocatalyst. Influences of various polymerization conditions, e.g., [Ti]. [MAO], [St], temperature and the
Polymerization of styrene using catalytic systems based on nickel derivatives and methylaluminoxane (MAO) was studied. Among tested catalysts, nickel bis-(acetylacetonate) and nickel dichloride show the maximum activity. Bis(phosphine)nickel dichlorides exhibit lower activity, depending on the natur
## 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
The copolymerization of styrene and ethylene was attempted in the presence of the catalytic system CpTiCl,methylaluminoxane. Polymerizations were carried out at different polymerization temperatures and Al/Ti mole ratios. The structure of the polymer was investigated with FTIR, DSC, GPC, and "C-NMR