Resumo

COSTA, Thaís H. S. et al. Synthesis of Ziegler-Natta catalysts: some routes and their difficulties. Quím. Nova [online]. 1997, vol.20, n.1, pp. 93-98. ISSN 0100-4042.  http://dx.doi.org/10.1590/S0100-40421997000100012.

The Ziegler-Natta catalyst and the polymerization thereof are systems which require careful handling and special treatment of chemicals. In spite of the use of inert atmosphere and dry chemicals, some Ziegler-Natta systems may present low activities or even may deactivate because of unsuitable handling. Some features of the TiCl₃ synthesis and its characterization when related to the presence of impurities are described. Evidences of poor handling of chemicals and/or laboratory devices while in synthesis of the catalyst are emphasized. The problems arising from butadiene polymerization and some relevant details in propylene polymerization are also presented with teaching objectives.

Palavras-chave : Ziegler-Natta catalysts; propylene; butadiene; polymerization.