| Autor: |
Marques, Maria Mercês, Tait, Peter J. T., Mejzlík, Jirí, Dias, Alberto Romão |
| Zdroj: |
Journal of Polymer Science Part A: Polymer Chemistry; March 1998, Vol. 36 Issue: 4 p573-585, 13p |
| Abstrakt: |
The concentration of active centers of a high-activity magnesium chloride-supported ZieglerNatta catalyst has been determined using three different methods. The initial active center concentration has been determined by quenching the reaction slurry with MeOT. To determine the concentration of the propagation species along the course of the polymerization the radio-tagging agent, 14CO, and the tagging agent, CS2, were used. CS2, was also investigated as a tagging agent of the growing chains, in a metallocene catalyst system. The results obtained were compared to obtain some insight about the reliability of each method and the kind of information each method can provide. © 1998 John Wiley & Sons, Inc. J Polym Sci A: Polym Chem 36: 573585, 1998 |
| Databáze: |
Supplemental Index |
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