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

Chiu-Hsun Lin, Chyi Yang Sheu

Research output: Contribution to journalArticle

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 languageEnglish
Pages (from-to)1058-1062
Number of pages5
JournalMacromolecular Rapid Communications
Volume21
Issue number15
DOIs
Publication statusPublished - 2000 Jan 1

Fingerprint

Polyethylene
Organometallics
Silicon Dioxide
Polyethylenes
Silica
Catalysts
Adsorption
Monoamine Oxidase
Particle size analysis
Fibers

All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

Cite this

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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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Silica-supported metallocenes : Effect of the preparation procedure on the morphology of polyethylene particles. / Lin, Chiu-Hsun; Sheu, Chyi Yang.

In: Macromolecular Rapid Communications, Vol. 21, No. 15, 01.01.2000, p. 1058-1062.

Research output: Contribution to journalArticle

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AU - Sheu, Chyi Yang

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