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- W1931456547 abstract "Polymerization of ethylene was carried out in toluene using the homogeneous catalytic system Cr[OC(CH3)3]4/Al(C2H5)2Cl, combined with various metal chlorides (MtClx). The polymerization activity was found to be strongly dependent upon the MtClx used. A clear correlation was found between the activity and the elctronegativity X(Mtx+) of the metal ion in MtClx. MtClx containing metal ions with X(Mtx+) < 8,5 (electronegativity of the active Cr2+) show a markedly increased activity, whereas those with X(Mtx+) > 8,5 have a rather decreased activity. Thus, for example, the catalyst combined with MgCl2 shows very high activity to give a linear polyethylene with a remarkably high molecular weight and narrow molecular weight distribution. A plausible mechanism for the enhancement of the activity by suitable MtClx is proposed on the basis of these results." @default.
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- W1931456547 date "1986-02-01" @default.
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- W1931456547 doi "https://doi.org/10.1002/macp.1986.021870214" @default.
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