Polymerization of propylene by mixed Ziegler-Natta and metallocene catalysts
| Autor: | Gershon Lidor, Moris S. Eisen, Anatoli Lisovskii, Michael Gishvoliner, Michael Shuster |
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| Rok vydání: | 1998 |
| Předmět: |
Polypropylene
chemistry.chemical_classification biology General Chemistry Polymer Natta biology.organism_classification law.invention Inorganic Chemistry chemistry.chemical_compound chemistry Polymerization law Polymer chemistry Coordination polymerization Ziegler–Natta catalyst Crystallization Metallocene |
| Zdroj: | Applied Organometallic Chemistry. 12:401-408 |
| ISSN: | 1099-0739 0268-2605 |
| DOI: | 10.1002/(sici)1099-0739(199806)12:6<401::aid-aoc702>3.0.co;2-h |
| Popis: | The polymerization of propylene using a mixture of racemic metallocenes and Ziegler–Natta catalysts was investigated. The polypropylene was obtained as a mixture of a fine powder and beads, with the powder being absorbed partially on the beads. The relative amount of the powder can be controlled by the concentration of the metallocene. The compatibility between the components of the mixed catalytic systems and the effect of the components on the rate of polymerization and on the properties of the new polymers were studied. The metallocene system dramatically affects the melt viscosity, isotacticity and molecular weight of the polymers. The two catalytic systems are able to act jointly, producing different polymers, for which separate melting and crystallization temperatures are obtained. © 1998 John Wiley & Sons, Ltd. |
| Databáze: | OpenAIRE |
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