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Volumn 18, Issue 8, 1999, Pages 1439-1443

Influence of alkyl substituents on the polymerization behavior of asymmetric ethylene-bridged zirconocene catalysts

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EID: 0000017095     PISSN: 02767333     EISSN: None     Source Type: Journal    
DOI: 10.1021/om9805741     Document Type: Article
Times cited : (38)

References (32)
  • 8
    • 84985630855 scopus 로고
    • Kaminsky, W.; Kulper, K.; Brintzinger, H. H.; Wild, F. R. W. P. Angew. Chem. 1985, 97, 507; Angew. Chem., Int. Ed. Engl. 1985, 24, 507.
    • (1985) Angew. Chem., Int. Ed. Engl. , vol.24 , pp. 507
  • 24
    • 3743063862 scopus 로고    scopus 로고
    • U.S. Patent 5191132, 1993
    • Alt, H. G. U.S. Patent 5191132, 1993.
    • Alt, H.G.1
  • 26
    • 3743054896 scopus 로고    scopus 로고
    • note
    • 13C analysis showed [mmmm] = 53% for the polymer obtained from 4a, and [mmmm] = 44% using 4b.
  • 28
    • 3743056038 scopus 로고    scopus 로고
    • note
    • Additional polymerization studies of 4b-d performed under the following conditions: MAO/Zr = 15000 mol/mol, 70 °C in liquid propylene for 1 h resulted in polypropylene with [mm] triads of 57, 25, and 91%, respectively. The respective GPC molecular weights were 40 000, 22 000, and 27 000 g/mol. Melting points of 114 and 151 °C were observed for the PP obtained using 4b and 4d, respectively. No melting point was observed for PP obtained using 4c.


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