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Brazilian Mineral Clay as Support for Metallocene Catalyst in the Synthesis of Polyethylene

Maria Marques and Rodrigo Tiosso
Affiliation: 
Instituto de Macromoleculas Professora Eloisa Mano/UFRJ Caixa Postal 68525, 21941-590 Rio de Janeiro fmarques@ima.ufrj.br
DOI: 
https://doi.org/10.23939/chcht04.02.139
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Keywords:

Abstract: 
Silica was compared with clays as supports for metallocene. Ethylene homopolymerization with both homogeneous and heterogeneous catalysts was performed. Activation energy was higher for (n-BuCp)2ZrCl2/SiO2/MAO, although high activities were obtained for catalysts with clay. They showed Ea close to that of homogeneous precursor. Catalyst/clay control polymer morphology until 363 K
References: 

[1] Soga K., Arai T., Hoang B. and Uozumi T.: Macromol. Rapid Commun., 1995, 16, 905.
https://doi.org/10.1002/marc.1995.030161205

[2] Hlatky G.: Chem. Rev., 2000, 100, 1347.
https://doi.org/10.1021/cr9902401

[3] Ferreira M., Greco P., dos Santos J. and Damiani D.: J. Mol. Catal. A, 2001, 172, 97.
https://doi.org/10.1016/S1381-1169(01)00129-7

[4] Ribeiro M., Deffieux A. and Portela M.: Ind. Eng. Chem. Res., 1997, 36, 1224.
https://doi.org/10.1021/ie960475s

[5] Fink G., Steinmetz B., Zechlin J. et al.: Chem. Rev., 2000, 100, 1377.
https://doi.org/10.1021/cr9804689

[6] Marques M. and Moreira S.: J. Mol. Catal. A, 2003, 192, 93.
https://doi.org/10.1016/S1381-1169(02)00250-9

[7] Belelli P., Ferreira M. and Damiani D.: Appl. Catal. A, 2002, 228, 189.
https://doi.org/10.1016/S0926-860X(01)00976-0

[8] Lee K.., Oh C., Yim J. and Ihm S.: J. Mol. Catal. A, 2000, 159, 30.
https://doi.org/10.1016/S1381-1169(00)00220-X

[9] Baltar C., Luz A., Oliveira C. and Aranha I.: [in:] Caracterização, ativação e modificação superficial de bentonitas brasileiras. CETEM, Rio de Janeiro 2003, 23-46.

[10] Wang W., Fan Z. and Feng L.: Eur. Polym. J., 2005, 41, 2380.
https://doi.org/10.1016/j.eurpolymj.2005.04.026

[11] Lee D., Kim H., Yoon K. et al.: Sci. Technol. Adv. Mater., 2005, 6, 457.

[11] Liu C., Tang T. and Huang B.: J. Catal., 2004, 221, 162.

[12] Shin S., Simon L., Soares J. and Scholz G.: Polymer, 2003, 44, 5317.
https://doi.org/10.1016/S0032-3861(03)00564-0

[13] Alexandre M., Dubois P., Sun T. et al.: Polymer, 2002, 43, 2123.
https://doi.org/10.1016/S0032-3861(02)00036-8