Indene → Indene

Participants

Reaction Steps

Under agitation with the stirrer, the charge was held at the reflux temperature by heating with an external heater. Thereafter, a solution containing 27 g (0.25 mol) of indene and 410 mg of azoisobutyronitrile (AIBN) as a radical polymerization initiator was charged into the overhead dropping funnel and this solution was dripped slowly into the polymerizer over 1 h. After completion of the dripping, the reaction solution was left under reflux for 2 h until the reaction was completed. The reaction solution was thereafter returned to room temperature and gradually added to 200 ml of n-hexane in a precipitating tank (beaker with an inner capacity of 500 ml), whereupon a white precipitate of indenemaleic anhydride copolymer formed. The precipitate was separated by filtration under suction and vacuum-dried to obtain a copolymer of indene and maleic anhydride in a yield of 95 wt% as calculated from equation (1) given hereinabove.

Provenance & Evidence