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
Polymerization of butene-1 with highly active MgCl2- supported TiCl4 catalyst system
β Scribed by N. Kashiwa; J. Yoshitake; A. Mizuno; T. Tsutsui
- Publisher
- Elsevier Science
- Year
- 1987
- Tongue
- English
- Weight
- 460 KB
- Volume
- 28
- Category
- Article
- ISSN
- 0032-3861
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π SIMILAR VOLUMES
Slurry polymerization of propene using MgC1,-supported TiClJdioctylphthalate catalysts were carried out in a semibatch reactor at a constant pressure to examine the effects of polymerization conditions on catalyst activity and polymer isotacticity. The catalysts were prepared at 80, 90, and 105"C, w
## Abstract MgCl~2~/TiCl~4~/SiO~2~ catalysts were prepared by treating TiCl~4~/SiO~2~ with MgCl~2~ Β· 2THF (THF: tetrahydrofuran) at different Mg/Ti ratios. The catalysts were analysed by Xβray, electron spin resonance (ESR), atomic absorption spectrometry to determine the crystal structure, oxidati
## Abstract ^13^C NMR analysis of the chainβend distribution of poly(propylenes) prepared using the highly active catalyst system MgCl~2~/TiCl~4~/dietherβAlEt~3~ has revealed particularly high proportions of butyl chainβends in polymers prepared at relatively low hydrogen pressures. This indicates
## Abstract Copolymerization of styrene and 1βbutene was first conducted at 50Β°C with a novel Ti catalyst by using Al(iBu)~3~ (iBu = isobutyl) as cocatalyst. The Ti catalyst is composed of MgCl~2~/TiCl~4~/PhCOOEt/Ph~2~SiCl~2~/SiCl~4~/NdCl~__x__~(OR)~__y__~/Al(iBu)~3~ (assigned as SNβ1 catalyst), wh