Search results for "właściwości polimeru"

Titanium-magnesium catalysts containing tetrahydrofuran and ethyl acetate for ethylene polymerization

2000

A complex [TiCl3(THF)2(CH3CO2C2H5] (I) was used as a pre-cursor of titanium-magnesium catalysts for ethylene polymerization. The complex was ball-milled in hexane with [MgCl2(THF)2] and activated with AlEt3 used as cocatalyst for 15 min at 323 K. Ethylene was polymerized at 323 K in hexane at a pressure of 0.5 MPa. The reaction was quenched with methanolic 5% HCl and the polymer was washed with methanol and dried at 303 K for 12 h at 5 hPa. The catalyst was found to be very active. Depen-ding on the nature of the cocatalyst used, the catalyst activity varied within a range of 21.5–93.0 kg PE/(g Ti ź h) and the resulting polymer was cha-racterized by specific gravity 0.955–0.968 g/cm3, bulk …