National Changhua University of Education Institutional Repository : Item 987654321/16834

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NCUEIR > College of Science > Department of Chemistry > Periodical Articles > Item 987654321/16834

Please use this identifier to cite or link to this item: http://ir.ncue.edu.tw/ir/handle/987654321/16834

Title:	Silica-Supported Metallocenes：Effect of the Preparation Procedure on the Morphology of Polyethylene Particles
Authors:	Lin, Chiu-Hsun;Sheu, Chyi-Yang
Contributors:	化學系
Date:	2000-10
Issue Date:	2013-06-05T09:36:25Z
Publisher:	John Wiley & Sons, Inc.
Abstract:	Polyethylene (PE) particles are produced by a catalyst prepared by contacting a (C4H9Cp)2ZrCl2/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 pre-mixing 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.
Relation:	Macromolecular Rapid Communications, 21(15): 1058-1062
Appears in Collections:	[Department of Chemistry] Periodical Articles

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