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Polymerization of propylene by metallocene and Ziegler–Natta mixed catalytic systems. Study of polypropylene properties

✍ Scribed by Anatoli Lisovskii; Michael Shuster; Michael Gishvoliner; Gershon Lidor; Moris S. Eisen

Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
155 KB
Volume
36
Category
Article
ISSN
0887-624X

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✦ Synopsis

Propylene was polymerized with metallocene and Ziegler-Natta mixedcatalytic systems to obtain reactor blends of metallocene and Ziegler-Natta-derived propylene homopolymers. The two catalytic systems are able to act jointly, providing individual polymers with different melting and crystallization temperatures. Compatibility between the components of the mixed-catalytic systems and the influence of the components on the polymerization process and on the properties of the reactor blends were studied. Thermal, mechanical, viscoelastic, rheological, and optical properties of the blends were tested and compared with those of conventional polypropylene grades.

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Polymerization of propylene by mixed Zie
Polymerization of propylene by mixed Ziegler–Natta and metallocene catalysts
✍ Anatoli Lisovskii; Michael Shuster; Michael Gishvoliner; Gershon Lidor; Moris S. 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 126 KB 👁 2 views

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