Metallocene catalyst anchored on supported MAO(sMAO): catalyst activation and polymerization conditions
碩士 === 國立中正大學 === 化學工程研究所 === 106 === In respect to polyolefin syntheses, metallocene/MAO catalytic system can precisely control molecular weight, molecular weight distribution, stereoregularity of polymer, comonomer content and comonomer distribution comparing with conventional Ziegler-Natta cataly...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2018
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| Online Access: | http://ndltd.ncl.edu.tw/handle/m5ac6g |
| Summary: | 碩士 === 國立中正大學 === 化學工程研究所 === 106 === In respect to polyolefin syntheses, metallocene/MAO catalytic system can precisely control molecular weight, molecular weight distribution, stereoregularity of polymer, comonomer content and comonomer distribution comparing with conventional Ziegler-Natta catalyst. However, using homogeneous metallocene catalyst for PE synthesis typically led to the production of PE polymers, which lacks morphological control and are industrially undesirable because of low bulk density. The problems encountered in using homogeneous metallocene catalystsc for PE syntheses can be attributed to the formation of polymer through undesired and uncontrolled polymer growth which eventually results in the fouling of the polymerization reactors (both slurry and gas phase reactors). Therefore, a metallocene-catalyst-based supported catalyst technology is very important for industrial applications.
This research focuses on the use of solid type MAO activator (sMAO) as the support and as the catalyst activator to combine with metallocene complexes for the generation of supported metallocene catalysts. Using sMAO as the support enables the production of PE with good morphological control exceptional high activity control which are very important for industrial applications.
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