Effective activation of metallocene catalyst with AlMCM-41 in propylene polymerization
AlMCM-41 was prepared by a post-synthesis alumination of MCM-41 and applied to propylene polymerization with rac-ethylene(bisindenyl)zirconium dichloride and triisobutylaluminium. The resulting catalyst system gave selectively isotactic polypropylene and the polymer yield was strongly dependent upon...
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| Veröffentlicht in: | Catalysis letters 2001, Vol.71 (1-2), p.105-110 |
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| container_title | Catalysis letters |
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| creator | SANO, Tsuneji NIIMI, Tsunehito MIYAZAKI, Toyoaki TSUBAKI, Shingo OUMI, Yasunori UOZUMI, Toshiya |
| description | AlMCM-41 was prepared by a post-synthesis alumination of MCM-41 and applied to propylene polymerization with rac-ethylene(bisindenyl)zirconium dichloride and triisobutylaluminium. The resulting catalyst system gave selectively isotactic polypropylene and the polymer yield was strongly dependent upon the evacuation temperature in the pretreatment of the AlMCM-41 before use. From the linear relationship between the polymer yield and the number of Lewis acid sites on the AlMCM-41 evaluated by pyridine adsorption, it was found that Lewis acid sites on AlMCM-41 are able to activate effectively the metallocene compound, resulting in the formation of active species. |
| doi_str_mv | 10.1023/A:1016616727383 |
| format | Article |
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The resulting catalyst system gave selectively isotactic polypropylene and the polymer yield was strongly dependent upon the evacuation temperature in the pretreatment of the AlMCM-41 before use. From the linear relationship between the polymer yield and the number of Lewis acid sites on the AlMCM-41 evaluated by pyridine adsorption, it was found that Lewis acid sites on AlMCM-41 are able to activate effectively the metallocene compound, resulting in the formation of active species.</description><identifier>ISSN: 1011-372X</identifier><identifier>EISSN: 1572-879X</identifier><identifier>DOI: 10.1023/A:1016616727383</identifier><language>eng</language><publisher>Dordrecht: Springer</publisher><subject>Applied sciences ; Catalysis ; Catalysts ; Dichlorides ; Exact sciences and technology ; Isotacticity ; Lewis acid ; Organic polymers ; Physicochemistry of polymers ; Polymerization ; Preparation, kinetics, thermodynamics, mechanism and catalysts ; Pretreatment ; Propylene ; Temperature dependence ; Zirconium</subject><ispartof>Catalysis letters, 2001, Vol.71 (1-2), p.105-110</ispartof><rights>2001 INIST-CNRS</rights><rights>Catalysis Letters is a copyright of Springer, (2001). 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The resulting catalyst system gave selectively isotactic polypropylene and the polymer yield was strongly dependent upon the evacuation temperature in the pretreatment of the AlMCM-41 before use. From the linear relationship between the polymer yield and the number of Lewis acid sites on the AlMCM-41 evaluated by pyridine adsorption, it was found that Lewis acid sites on AlMCM-41 are able to activate effectively the metallocene compound, resulting in the formation of active species.</abstract><cop>Dordrecht</cop><pub>Springer</pub><doi>10.1023/A:1016616727383</doi><tpages>6</tpages></addata></record> |
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| ispartof | Catalysis letters, 2001, Vol.71 (1-2), p.105-110 |
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| language | eng |
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| subjects | Applied sciences Catalysis Catalysts Dichlorides Exact sciences and technology Isotacticity Lewis acid Organic polymers Physicochemistry of polymers Polymerization Preparation, kinetics, thermodynamics, mechanism and catalysts Pretreatment Propylene Temperature dependence Zirconium |
| title | Effective activation of metallocene catalyst with AlMCM-41 in propylene polymerization |
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