Study of the polymerization of 1-octadecene with different rnetallocene catalysts |
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| Authors: | Raúl Quijada Juan Luis Guevara Mehrdad Yazdani-Pedram Griselda B Galland Daniel Ribeiro |
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| Affiliation: | 1.Departamento de Ingeniería Química, Facultad de Ciencias Físicas y Matemáticas, Universidad de Chile, Casilla 2777 y Centro para la Investigación Interdisciplinaria Avanzada en Ciencias de 10s Materiales (CIMAT). Santiago, Chile. E-mail: raquiiad@cec.uchile.cl,CL |
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| Abstract: | Summary
1-Octadecene (C18) was polymerized by using different metallocene catalysts. The rac-Et(Ind)2ZrC12/MAO (I) and rac-Me2Si(Ind)2ZrC12/MAO (III) presented the highest activity as compared with ra-Et(2-Me-Ind)2ZrCl2/MAO (II) and Ph2C(Flu)(Cp)ZrC12/MAO (IV) catalysts. Catalyst IV produced polymers with highest molecular weights. The microstructure of the polymers was
determined by 13C-NMR spectroscopy. Catalyst systems I, II and III produced isotactic polymers while catalyst IV produced polymers with mainly
syndiotactic structures but with large amount of stereoregular error.
Received: 21 June 2002/Revised version: 4 November 2002/ Accepted: 4 November 2002 |
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