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

• Autorzy: Szczegot K. , Sibielska-Wiercigroch I. , Efler J. , Flisak Z.

Warianty tytułu

PL

Katalizatory tytanowo-magnezowe zawiarające tetrahydrofuran i octan etylu, stosowane do polimeryzacji etylenu

• Konferencja: VII International Seminar on Organometallic Complexes as Catalyst of Vinyl Compounds Polymerization (Turawa k/Opola; 1999)
• Języki publikacji: EN

Abstrakty

EN

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 density 115–128 g/dm3, crystallinity 57.5–61.7% and molecular weight distribution width 9.04–11. The complex (I) is believed to decompose at the catalyst prepara-tion step. Catalyst activities of (I) were compared with those of catalysts ba-sed on titanium(III) and titanium(IV) chlorides and their complexes with Lewis bases. Pure (I) activated with organoaluminum compound is inactive in low-pressure ethylene polymerization.

Słowa kluczowe

EN

ethylene polymerization; catalyst activity; polymer properties

PL

polimeryzacja etylenu; aktywność katalizatora; właściwości polimeru

• Wydawca: Sieć Badawcza Łukasiewicz – Instytut Chemii Przemysłowej
• Czasopismo: Polimery
• Rocznik: 2000
• Tom: T. 45, nr 5
• Strony: 344--348

Twórcy

autor

Szczegot K.

autor

Sibielska-Wiercigroch I.

autor

Efler J.

autor

Flisak Z.