| Summary: | 碩士 === 東海大學 === 化學工程學系 === 95 === The purpose of this thesis is to study supported metallocene catalysts prepared by impregnation method for propylene polymerization in a slurry reactor. A montmorillonite particle was used as the support to prepare an Et(Ind)2ZrCl2/MAO and a MeSi(Ind)2ZrCl2/MAO catalyst for propylene polymerization of propylene. First we change calcinatiom temperature to find the best support. Then, we studied the effect of reaction condition on isotatic polypropylene yield, molecular weight, and its melting point. Finally, the catalyst and the polymer produced were characterized with ICP-AES, FTIR, BET, XRD, DSC, GPC, OM, 13C- NMR, TFSEM.
We found that metallocene supported on montmorillonite particle had the better yield and activity, but it didn’t contain high Zr content. The supports calcined at 450 °C had best yield and activity. We found that Et(Ind)2ZrCl2 catalyst had the better yield, but its product did not have higher melting point (Tm) than that reported before. And Me2Si(Ind)2ZrCl2 catalyst had higher melting point(Tm) than that reported before.
We found the optimum polymerization temporization temperature was 55°C and the amount of external MAO in the reaction mixture was MAO 3ml. DSC results indicated that polymer melting point increased with the the decrease of polymerization temperature and the increase of MAO.
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