Ethylene → Ethene propene 1-butene

Participants

Reaction Steps

Specifically, PEBR was prepared as follows. Namely, in a 2000-mL polymerization reactor fully purged with nitrogen, 917 mL of dry hexane, 90 g of 1-butene, and 1.0 mmol of triisobutylaluminum were charged at normal temperature, the inside temperature of the reactor was elevated to 65° C., and propylene was introduced so that the inside pressure of reactor increased to 0.77 MPa, and then ethylene was supplied so as to adjust the pressure to 0.79 MPa. To this reactor was added a toluene solution in which 0.002 mmol of dimethylmethylene(3-tert-butyl-5-methylcyclopentadienyl)fluorenylzirconium dichloride and 0.6 mmol (relative to aluminum) of methylaluminoxane (available from Tosoh Finechem Corp.) had been contacted, and the polymerization was conducted for 20 min while the inside temperature was kept at 65° C. and ethylene was supplied to keep the inside pressure at 0.79 MPa. The polymerization was terminated by adding 20 mL of methanol, the pressure was released, and the polymer was precipitated from the polymerization solution in 2 L of methanol and dried at 130° C. under vacuum for 12 hr to yield 60.4 g of the desired polymer.

Provenance & Evidence