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- W1896270024 abstract "Abstract The catalyst NdCl 3 /EtOH/TiCl 4 (NSC) was prepared using NdCl 3 as carrier. The composition of the NSC was analyzed by IR, XPS, GC and titration. This catalyst and MgCl 2 /EtOH/TiCl 4 catalyst (MSC) were employed for the polymerization of ethylene and propene. The titanium component in NSC exists basically as Ti(OEt)Cl 3 but both as TiCl 4 and Ti(OEt)Cl 3 in MSC. NSC combined with organoaluminium compounds polymerizes ethylene with fairly high productivity. Both the activity and the concentration of active centres C * in ethylene polymerization with NSC‐AlEt 3 catalyst system decrease with increasing temperature, while the propagation rate constant k p increases. The difference in the kinetic behavior for polymerization of ethylene between the NSC‐AlEt 3 and the MSC‐AlEt 3 catalyst system would arise mainly from the different stability and reactivity of the titanium active center. The activity for polymerization of propene by using NSC in comparison to MSC is very low." @default.
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- W1896270024 doi "https://doi.org/10.1002/macp.1991.021920504" @default.
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