Abstract
Summary — Three titanium catalyst systems supported on the MgCl 2 (THF)(AlEt 2 Cl) 0.34 complexwere synthesised by changing both the synthetic method and the precursor/support ratio. Afteractivation by AlEt 3 , the catalysts were applied for ethylene polymerization. All three systems provedto be single site catalysts regardless of the method of synthesis. This was confirmed by the kineticscurve character and the properties of the produced polyethylene. Due to the simultaneous reactionreduction and immobilization of TiCl 4 (at AlEt 2 Cl/TiCl 4 molar ratio greater than 1) the actual time forthe polymerization reaction to begin can be shortened to the minimum needed to only dissolve theethylene in the reaction medium. Furthermore, the amount of the AlEt 3 activator (AlEt 3 /TiCl 4 < 1000)is also considerably reduced when the high activity of the catalyst is maintained. Key words : ethylene polymerization, supported titanium catalyst, magnesium carrier, polymer pro-perties.KATALIZATOR TYTANOWY (TiCl
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