| SUPPORTED CATALYST WITHOUT EXTERNAL ELECTRON DONOR FOR PROPYLENE POLYMERIZATION Ⅱ. TACTICITY DISTRIBUTION AND MICROSTRUCTURE OF POLYPROPYLENE* |
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| 引用本文： | 徐君庭,封麟先,王森辉,杨士林. SUPPORTED CATALYST WITHOUT EXTERNAL ELECTRON DONOR FOR PROPYLENE POLYMERIZATION Ⅱ. TACTICITY DISTRIBUTION AND MICROSTRUCTURE OF POLYPROPYLENE*[J]. 高分子科学, 1998, 0(1): 56-61 |
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| 作者姓名： | 徐君庭 封麟先 王森辉 杨士林 |
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| 作者单位： | Department of Polymer Science & Engineering，Zhejiang University，Hangzhou 310027，China，Department of Polymer Science & Engineering，Zhejiang University，Hangzhou 310027，China，Department of Polymer Science & Engineering，Zhejiang University，Hangzhou 310027，China，Department of Polymer Science & Engineering，Zhejiang University，Hangzhou 310027，China |
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| 基金项目： | This work is supported by the National Natural Science Foundation of China |
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| 摘 要： | Propylene was polymerized with a novel supported Ziegler-Natta catalystcontaining 2,2-di-iso-butyl-1,3-dimethoxy-propane (DIBDMP) as internal donor and in theabsence of external donor. The tacticity distribution of polypropylene was obtained by usingtemperature rising elution fractionation (TREF) technique and microstructure of fractionswas studied with ~(13)C-NMR. Compared with the catalyst without electron donor, this cat-alyst gives a considerably narrower tacticity distribution. Fractionation data demonstratethat DIBDMP shows better performance than aromatic diester DNBP (di-n-butyl phtha-late). Chemically inverted propylene units and less stereoblockiness are found in the firstfraction. Possible reasons for these were presented.
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| 收稿时间： | 1997-03-27 |
SUPPORTED CATALYST WITHOUT EXTERNAL ELECTRON DONOR FOR PROPYLENE POLYMERIZATION Ⅱ. TACTICITY DISTRIBUTION AND MICROSTRUCTURE OF POLYPROPYLENE* |
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| XU Junting,Feng Linxian,Wang Senhui,Yang Shilin. SUPPORTED CATALYST WITHOUT EXTERNAL ELECTRON DONOR FOR PROPYLENE POLYMERIZATION Ⅱ. TACTICITY DISTRIBUTION AND MICROSTRUCTURE OF POLYPROPYLENE*[J]. Chinese Journal of Polymer Science, 1998, 0(1): 56-61 |
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| Authors: | XU Junting Feng Linxian Wang Senhui Yang Shilin |
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| Affiliation: | Department of Polymer Science & Engineering; Zhejiang University; Hangzhou 310027; China |
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| Abstract: | Propylene was polymerized with a novel supported Ziegler-Natta catalystcontaining 2,2-di-iso-butyl-1,3-dimethoxy-propane (DIBDMP) as internal donor and in theabsence of external donor. The tacticity distribution of polypropylene was obtained by usingtemperature rising elution fractionation (TREF) technique and microstructure of fractionswas studied with ~(13)C-NMR. Compared with the catalyst without electron donor, this cat-alyst gives a considerably narrower tacticity distribution. Fractionation data demonstratethat DIBDMP shows better performance than aromatic diester DNBP (di-n-butyl phtha-late). Chemically inverted propylene units and less stereoblockiness are found in the firstfraction. Possible reasons for these were presented. |
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| Keywords: | Polypropylene Ziegler-Natta catalyst Electron donor Tacticity distribution |
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