## Abstract Experiments designed to prepare Ziegler‐Natta catalysts with controlled particle morphology are reported. Different dealcoholation processes are used on the adduct MgCl~2~ · __n__EtOH to prepare the catalysts: either thermal treatment or chemical dealcoholation employing different subst
Ethylene-propylene copolymers by a supported Ziegler-Natta catalyst based on TiCl4/MgCl2
✍ Scribed by Fernanda M. B. Coutinho; José Luiz Luna Xavier
- Publisher
- Springer
- Year
- 1997
- Tongue
- English
- Weight
- 592 KB
- Volume
- 39
- Category
- Article
- ISSN
- 0170-0839
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## Abstract A supported magnesium‐vanadium‐aluminium catalyst was prepared by depositing –with the use of a milling technique–VOCl~3~ on the MgCl~2~(THF)~2~ support and subsequent activation with diethylaluminium chloride. Catalytic activity of the obtained system for ethylene polymerization was ev
## Abstract An ethylene–propylene copolymer synthesized with a Ziegler–Natta catalyst was fractionated by a combination of dissolution/precipitation and temperature‐gradient extraction fractionation. The fractions were characterized with ^13^C‐NMR, differential scanning calorimetry, and wide‐angle
## Abstract Spherical MgCl~2~·nEtOH was prepared by adducting ethanol to MgCl~2~ using melt quenching method. Effect of molar ratio of [EtOH]/[MgCl~2~] = 2.8–3.05 on the morphology and particle size of the MgCl~2~·nEtOH were studied. The best adduct of spherical morphology was obtained when 2.9 mol
## Abstract A high‐activity Ziegler–Natta catalyst of TiCl~4~‐supported MgCl~2~ (ethoxide type) was prepared. Ethyl benzoate (EB) and polydimethylsiloxane (PDMS) were used as internal donors, while __p__‐methyl toluate (MPT) and triethylaluminum (TEA) were used as the external donor and cocatalyst,