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http://ir.ncue.edu.tw/ir/handle/987654321/16825
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| 題名: | 支撐金屬稀聚合觸媒製備方法研究
Preparation of Supported Metallocene Catalysts for Polymerization of Alfa-Olefins |
| 作者: | 林秋薰 |
| 貢獻者: | 化學系 |
| 關鍵詞: | Supported;Metallocene;Polyethylene;Morphology;Nanotube;Titanium oxide;Molecular weight distribution
支撐金屬烯觸媒;聚乙烯;粒徑;納米管;二氧化鈦;載體 |
| 日期: | 2000
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| 上傳時間: | 2013-06-05T09:36:13Z
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| 出版者: | 行政院國家科學委員會 |
| 摘要: | The morphology of a polyethlene particle produced by supported metallocene catalysts is strongly affected by the preparation method. The particles prepared by the pre-mixing method have a granular shape, large particle diametr, high bulk density and a low number of fine particles. Scanning electron microscope reveals that PE particles produced by the pre-mixing catalyst consist of globules with randomly oriented fiber structure, whereas those produced by the adsorption catalyst have finger-like fibrils protruding from the PE globule surface.To improve the molecular weight distribution of the metallocene-base polyethylene, a titanium oxide particle containing uniform nanotube structure on the surface was prepared to be used as the catalyst support.
以 pre-mixing 方法製備的支撐金屬烯可做為製備聚乙烯(PE)優良的聚合觸梅，所得的PE具有顆粒形狀、較大粒徑、整體密度較高的微粒較少的優點。掃描式電子顯微鏡(SEM)的結果指出以 adsorptin 和 pre-mixing 兩種不同方法製備的支撐金屬烯觸媒，所生產的PE顆粒具有非常不同的型態(morphology)。前者顆粒表面具有指狀的突出物，後者的表面則是由許多層狀的PE重疊而成。為改進金屬烯觸媒生產PE時其分子量分布(MWD)狹窄的缺點，本計畫亦利用水熱法合成具有規則納米孔道的二氧化鈦，做為支撐金屬烯觸媒的載體。 |
| 關聯: | 國科會計畫, 計畫編號: NSC89-2113-M018-007; 研究期間:8808-8907 |
| 顯示於類別: | [化學系] 國科會計畫
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