Boletín de la Sociedad Chilena de Química
versión impresa ISSN 0366-1644
GUEVARA, JUAN LUIS et al. ESTUDIO DE LA POLIMERIZACION DE PROPENO UTILIZANDO DIFERENTES CATALIZADORES METALOCENOS. Bol. Soc. Chil. Quím. [online]. 2002, vol.47, n.2, pp. 81-90. ISSN 0366-1644. doi: 10.4067/S0366-16442002000200003.
The present study reports the propylene polymerization using four different metallocene catalysts: rac-Et(Ind)2ZrCl2 (I); rac-Et(2-Me-Ind)2ZrCl2 (II); rac-Me2Si(Ind)2ZrCl2 (III) and Ph2C(Flu)(Cp)ZrCl2 (IV) in the presence of Metilaluminoxane (MAO) as cocatalyst. The polymerization carried out using different conditions of temperature, catalyst concentration, cocatalyst/catalyst ration and monomer concentration. The study was made with the aid of a statistical model of experimental planning. It was observed that the type of catalyst, and the experimental conditions of reaction have a significative influence in the catalytic activity and the properties of polymers obtained. Elevated values of activity were found at temperature of 70 C with catalysts I and III. Catalyst III produced polypropylenes with highest isotacticity. With catalyst IV were obtained syndiotactics polymers
Palabras clave : Metallocene catalyst; polymerization; polypropylene; tacticity.