Carbon Dioxide → HCID 6713780, compound

Participants

Reaction Conditions

Reaction Steps

A stirring device, a thermometer and a reflux condenser are mounted to a 500 ml four-neck flask. To the four-neck flask, 81.0 g of α-methylstyrene, 9 g of indene (that is, α-methylstyrene: 90 mass %, indene: 10 mass %) and 240 ml of Toluene are charged as a reaction mixed solution and the solution is stirred thoroughly. 0.9 g of boron trifluoride phenol complex and 9 g of toluene as catalyst are charged in a dropping funnel and the dropping funnel is mounted to the four-neck flask. Thereafter, the catalyst is added dropwise to the reaction mixed solution during a period of 15 minutes in a state where the temperature of the reaction mixed solution, which has been uniformly dispersed, is maintained in the range of 1 to 3° C. by using an alcohol bath cooled with dry ice, so that a polymerization reaction is started. After dropwise addition of the catalyst is completed, the polymerization is allowed to proceed for further 1 hour in the state where the temperature of the solution is kept in the range of 1 to 3° C. Then, the polymerization reaction is stopped by adding an aqueous solution of 0.5N sodium hydroxide to the reaction mixed solution. The reaction product thus obtained is washed with 100 ml of water three times and then the solvent and unreacted monomers are removed under a reduced pressure, whereby an α-methylstyrene/indene copolymer resin is obtained (the yield: 85 g). The α-methylstyrene/indene copolymer resin thus obtained has softening point: 145° C., number-average molecular weight (Mn): 800, and weight-average molecular weight (Mw): 3500.

Provenance & Evidence