International Journal of Polymer Science / 2016 / Article / Tab 3

Research Article

A Comparative Study of AlCl3 and FeCl2-Modified TiCl4/MgCl2/THF Catalytic System in the Presence of Hydrogen for Ethylene Polymerization

Table 3

Catalytic activity of different doped Lewis acid catalysts in ethylene polymerization.

CatalystH2/C2H4 molar ratioActivity
(kg PE/g)
Activity ratio without H2Activity ratio with H2

None-THF07321.001.00
0.086450.88
0.203620.49
0.303130.43

Al-THF08541.171.00
0.085600.66
0.202790.33
0.302460.29

Fe-THF013641.861.00
0.084520.33
0.203300.24
0.303750.28

Condition: polymerization was performed in 2 L autoclave, [Ti] = 0.008 mmol for all catalysts, Al/Ti molar ratio = 140, cocatalyst = TEA, polymerization time = 1 h, reaction temperature = 80°C, total pressure = 8 bars under 1 bar of nitrogen, and desired amount of H2/C2H4 molar ratio = 0, 0.08, 0.20, and 0.30.

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