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
Stopped flow polymerization of propene with typical MgCl2-supported high-yield catalysts
β Scribed by Minoru Terano; Takuo Kataoka; Tominaga Keii
- Publisher
- Elsevier Science
- Year
- 1989
- Weight
- 429 KB
- Volume
- 56
- Category
- Article
- ISSN
- 0304-5102
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A well-defined diblock copolymer, polypropene-block-poly(ethene-co-propene), was synthesized by modified stopped-flow polymerization with an MgCl 2 -supported Ziegler catalyst. The copolymer shows a unimodal gel permeation chromatography (GPC) elution curve without any material in the low molecular
## Abstract ^13^C NMR analysis of poly(propylene) fractions of different tacticity, obtained using a catalyst system of type MgCl~2~/TiCl~4~/diisobutyl phthalate β AlEt~3~ β diether, has provided further evidence that the active species in this system are similar to those in which the ether is used
## Abstract A fineβgrain catalyst, as a model of catalyst fragmentation in the course of polymerization, was prepared by grinding an original MgCl~2~βsupported Ziegler catalyst. In order to clarify the nature of the active sites generated after catalyst fragmentation, the kinetic parameters for pro