| Summary: | 碩士 === 東海大學 === 化學工程與材料工程學系 === 99 === Abstract
The propose of this thesis is to study ethylene polymerization and ethylene/styrene copolymerization catalyzed by supported [(C5Me4)SiMe2(NtBu)]TiCl2 catalyst. The catalyst was prepared by impregnation method. The reaction was carried out in a slurry reactor. We studied the effects of support types, reaction temperature, the amuont of styrene and the homogeneous/heterogeneous catalyst on the polymer yield. We studied the characteristics of the products we made.
We found that 100℃ was the best reaction temperature for the HDPE production and the yield of the nano-sized was better then the yield of the micro-sized. When the reaction temperature was 90℃ and the amount of styrene was 50ml, the copolymerization had the best yield. SEM showed that the morphology of HDPE and ethylene-styrene copolymer became more compact with increasing reaction temperature. XRD showed that the peak intensity of HDPE and copolymer increased with increasing temperature. The ESI yield of the nano-sized was less than the yield of the micro-sized, which was different with the HDPE results. But SEM showed that the copolymer product with nano-sized catalyst had more hole than those produced with micro-sized. The yield of homogeneous catalyst was higher than the yield of heterogeneous catalyst. But the homogeneous product was more compact and less elasticity than the heterogeneous product.
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