One-phase supported titanium-based catalysts for polymerization of ethylene. III. ESR spectra of the ternary system Sio2—R3Al—TiCl4 |
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Authors: | P V
orek P indel E ernokov J Hole
ek |
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Institution: | P. Věčorek,P. Šindelář,E. Černošková,J. Holeček |
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Abstract: | The ternary catalyst systems based on activated silica, aluminum alkyl, and titanium tetrachloride were polymerized in an ethylene gas-phase polymerization process, and further studied using ESR spectroscopy. Two types of titanium (III) ESR-active centers were observed and a linear dependence between the concentration of that characterized by a rhombic anisotropic signal with g1 = 1.962, g2 = 1.945, and g3 = 1.913 values and catalyst productivity was found. © 1993 John Wiley & Sons, Inc. |
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Keywords: | silica titanium Ziegler— Natta catalyst ethylene polymerization ESR spectroscopy |
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