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Volumn 32, Issue 26, 1999, Pages 9078-9079

Stereospecifie polymerization of 1,3-butadiene with samarocene-based catalysts

Author keywords

[No Author keywords available]

Indexed keywords

CATALYST ACTIVITY; CATALYST SELECTIVITY; LANTHANUM COMPOUNDS; ORGANOMETALLICS; POLYMERIZATION; STEREOCHEMISTRY;

EID: 12944301064     PISSN: 00249297     EISSN: None     Source Type: Journal    
DOI: 10.1021/ma9913358     Document Type: Article
Times cited : (131)

References (27)
  • 1
    • 33745531021 scopus 로고    scopus 로고
    • This work was presented in part at the following meetings, (a) The 76th National Meeting of the Chemical Society of Japan, Yokohama, Japan, March 1999; paper 2H105.
    • This work was presented in part at the following meetings, (a) The 76th National Meeting of the Chemical Society of Japan, Yokohama, Japan, March 1999; paper 2H105.
  • 2
    • 0006319825 scopus 로고    scopus 로고
    • (b) The 48th Annual Meeting of the Society of Polymer Science, Kyoto, Japan, May 1999; paper IIPa023: Kaita, S.; Hou, Z.; Wakatsuki, Y. Polym. Prepr. Jpn. 1999, 48, 221.
    • (1999) Polym. Prepr. Jpn. , vol.48 , pp. 221
    • Kaita, S.1    Hou, Z.2    Wakatsuki, Y.3
  • 3
    • 33745545561 scopus 로고    scopus 로고
    • Special Postdoctoral Researcher under the Basic Science Program of RIKEN.
    • Special Postdoctoral Researcher under the Basic Science Program of RIKEN.
  • 4
    • 0001867047 scopus 로고
    • Eastmond, G. C., Ledwith, A., Russo, S., Sigwalt, P., Eds.; Pergamon Press: Oxford, U.K.
    • For a review, see: Porri, L.; Giarrusso, A. In Comprehensive Polymer Science; Eastmond, G. C., Ledwith, A., Russo, S., Sigwalt, P., Eds.; Pergamon Press: Oxford, U.K., 1989; Vol. 4, pp 53-108.
    • (1989) Comprehensive Polymer Science , vol.4 , pp. 53-108
    • Porri, L.1    Giarrusso, A.2
  • 18
    • 0001521657 scopus 로고
    • (d) Yasuda, H.; Furo, M.; Yamamoto, H.; Miyake, S.; Kibino, N. Macromolecules 1992,25,5115.
    • Yasuda, H.; Yamamoto, H.; Yokota, K.; Miyake, S.; Nakamura, A. J. Am. Chem. Soc. 1992, 114, 4908. (d) Yasuda, H.; Furo, M.; Yamamoto, H.; Miyake, S.; Kibino, N. Macromolecules 1992,25,5115.
    • (1992) J. Am. Chem. Soc. , vol.114 , pp. 4908
    • Yasuda, H.1    Yamamoto, H.2    Yokota, K.3    Miyake, S.4    Nakamura, A.5
  • 21
    • 33745527842 scopus 로고    scopus 로고
    • note
    • The catalytic activity was strongly dependent on the [MMAO]/ [1] ratio. The polymerization did not occur at the ratio of [MMAO]/[1] < 50. When more than 500 equiv of MMAO was used, the catalytic activity decreased compared to that in the case of [MMAOM1] = 200. The use of PMAO (ordinary methylaluminoxane) instead of MMAO gave a polymer with lower 1,4-cis content under the same conditions.
  • 22
    • 33745544049 scopus 로고    scopus 로고
    • note
    • The microstructure of the poly(BD) products was measured by JH NMR and 13C NMR spectroscopy (JNM EX-300) in CDC13. 'H NMR: O4.8-5.2 (=CH2 of 1,2-BD unit), 5.2-5.8 (-CH= of 1,4-BD unit and -CH= of 1,2-BD unit). 13C NMR: <5 27.4 (1,4-cis-BD unit), 32.7 (l,4-/rans-BD unit), 127.7-131.8 (1,4-BD unit), 113.8-114.8 and 143.3-144.7 (1,2-BD unit). The weight-average molecular weight (Mw), the number-average molecular weight (Mn), and the molecular weight distribution (Mw/Afn) of the polymers were measured by GPC [Shodex GPC System-11; detector, RI (RI71); column, GPC KF-508L x 2; temperature, 40 °C; eluent, THF; polystyrene standard].
  • 25
    • 33746295241 scopus 로고    scopus 로고
    • note
    • It has been well-known that the reaction of group 4 metallocene chlorides with MAO generates the corresponding metallocene alkyl cations which are similarly active as those formed in the metallocene alkyl/MAO systems. For examples, see: (a) Brintzinger, H. H.; Fischer, D.; Mülhaupt, R.; Rieger, B.; Waymouth, R. M. Angew. Chem., Int. Ed. Engl. 1995, 34, 1143. (b) Bochmann, M. J. Chem. Soc., Dalton Trans. 1996, 255. (c) Cornils, B.; Herrmann, W. A. Applied Homogeneous Catalysis with Organometallic Compounds; VCH: Weinheim, 1996. The fact that the (C5Meö)2Sm(Cl)(THF)MMAO system shows no activity for the polymerization of BD might be due to the difficulty of alkylation of (CsMea SmtClXTHF) by MMAO under the present conditions.
  • 26
    • 2642671416 scopus 로고
    • (b) Ewen, J. A.; Elder, M. J.; Jones, R. L.; Haspeslagh, L.; Atwood, J. L.; Bptt, S. G.; Robinson, K. Makromol. Chem., Macromol. Symp. 1991, 48/49, 253. (c) Chien, J. C. W.; Tsai, W. M.; Rausch, M. D. J. Am. Chem. Soc. 1991, 113, 8570. (d) Pellecchia, C.; Longo, P.; Proto, A.; Zambelli, A. Makromol. Chem., Rapid Commun. 1992, 13, 265.
    • (a) Yang, X.; Stern, C. L.; Marks, T. J. Organometallics 1991, 10, 840. (b) Ewen, J. A.; Elder, M. J.; Jones, R. L.; Haspeslagh, L.; Atwood, J. L.; Bptt, S. G.; Robinson, K. Makromol. Chem., Macromol. Symp. 1991, 48/49, 253. (c) Chien, J. C. W.; Tsai, W. M.; Rausch, M. D. J. Am. Chem. Soc. 1991, 113, 8570. (d) Pellecchia, C.; Longo, P.; Proto, A.; Zambelli, A. Makromol. Chem., Rapid Commun. 1992, 13, 265.
    • (1991) Organometallics , vol.10 , pp. 840
    • Yang, X.1    Stern, C.L.2    Marks, T.J.3
  • 27
    • 33745557532 scopus 로고    scopus 로고
    • note
    • It was established that none of l/Al(i-Bu)3, l/[Ph3C][B(C6F5)4], or AKi-BuMPhaCKBtCeFs).!] showed activity under the same conditions.


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