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Titolo:
Effective activation of metallocene catalyst with AlMCM-41 in propylene polymerization
Autore:
Sano, T; Niimi, T; Miyazaki, T; Tsubaki, S; Oumi, Y; Uozumi, T;
Indirizzi:
Japan Adv Inst Sci & Technol, Sch Mat Sci, Tatsunokuchi, Ishikawa 9231292,Japan Japan Adv Inst Sci & Technol Tatsunokuchi Ishikawa Japan 9231292 92,Japan
Titolo Testata:
CATALYSIS LETTERS
fascicolo: 1-2, volume: 71, anno: 2001,
pagine: 105 - 110
SICI:
1011-372X(2001)71:1-2<105:EAOMCW>2.0.ZU;2-Q
Fonte:
ISI
Lingua:
ENG
Soggetto:
MOLECULAR-SIEVE MCM-41; MESOPOROUS SILICA; ION-EXCHANGE; PROPENE; METHYLALUMINOXANE; ALUMINATION; DICHLORIDE; STABILITY; ACIDITY; CATION;
Keywords:
AlMCM-41; metallocene; cocatalyst; polymerization; propylene;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
25
Recensione:
Indirizzi per estratti:
Indirizzo: Sano, T Japan Adv Inst Sci & Technol, Sch Mat Sci, Tatsunokuchi, Ishikawa 9231292,Japan Japan Adv Inst Sci & Technol Tatsunokuchi Ishikawa Japan 9231292
Citazione:
T. Sano et al., "Effective activation of metallocene catalyst with AlMCM-41 in propylene polymerization", CATAL LETT, 71(1-2), 2001, pp. 105-110

Abstract

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 themetallocene compound, resulting in the formation of active species.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 19/09/20 alle ore 09:25:30