Isoprene → Isoprene butadiene

Participants

Reaction Steps

Under nitrogen, at 20° C., 2,000 g of hexane, 162 g (3 mol) hexane solution of butadiene, 204 g (3 mol) isoprene, and 204 ml neodymium-based catalyst prepared in the example above were added into a 5 L polymerization vessel, and agitated and the reaction was maintained for 2 h. The resulting polymer mixture was discharged from the vessel and 100 ml of ethanol solution was added to terminate the reaction. The resulting polymer mixture was then precipitated, washed, and dried, to obtain 340 g of a random butadiene-isoprene copolymer. For the resulting product, the number-average molecular weight=2.8×105, the molecular weight distribution=3.52, and the Mooney viscosity=82.

Provenance & Evidence