Silica-supported metallocenes: Effect of the preparation procedure on the morphology of polyethylene particles

Chiu Hsun Lin; Chyi Yang Sheu

doi:10.1002/1521-3927(20001001)21:15<1058::AID-MARC1058>3.0.CO;2-K

Silica-supported metallocenes: Effect of the preparation procedure on the morphology of polyethylene particles

Chiu Hsun Lin, Chyi Yang Sheu

Department of Chemistry

Research output: Contribution to journal › Article › peer-review

13 Citations (Scopus)

Abstract

Polyethylene (PE) particles are produced by a catalyst prepared by contacting a (C₄H₉Cp)₂-ZrCl₂/MAO pre-mixing solution with SiO² support. These particles have a large granular size and very few fine particles compared with those derived from a catalyst prepared by adsorption of (C₄H₉Cp)₂ZrCl₂ onto methylaluminoxane modified SiO₂. The amount of Al in the pre-mixing catalyst has an important effect on its activity and the PE particle size distribution. The optimal concentration is about 30 wt.-%. The PE particles produced using a premixing catalyst consist of globules with randomly oriented fiber structure on the surface, whereas those produced using adsorption catalysts have worm-like fibrils protruding from the PE globule surface.

Original language	English
Pages (from-to)	1058-1062
Number of pages	5
Journal	Macromolecular Rapid Communications
Volume	21
Issue number	15
DOIs	https://doi.org/10.1002/1521-3927(20001001)21:15<1058::AID-MARC1058>3.0.CO;2-K
Publication status	Published - 2000 Jan 1

All Science Journal Classification (ASJC) codes

Organic Chemistry
Polymers and Plastics
Materials Chemistry

Access to Document

10.1002/1521-3927(20001001)21:15<1058::AID-MARC1058>3.0.CO;2-K

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abstract = "Polyethylene (PE) particles are produced by a catalyst prepared by contacting a (C4H9Cp)2-ZrCl2/MAO pre-mixing solution with SiO2 support. These particles have a large granular size and very few fine particles compared with those derived from a catalyst prepared by adsorption of (C4H9Cp)2ZrCl2 onto methylaluminoxane modified SiO2. The amount of Al in the pre-mixing catalyst has an important effect on its activity and the PE particle size distribution. The optimal concentration is about 30 wt.-%. The PE particles produced using a premixing catalyst consist of globules with randomly oriented fiber structure on the surface, whereas those produced using adsorption catalysts have worm-like fibrils protruding from the PE globule surface.",

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