Styrene → Isobutylene styrene

Participants

Reaction Conditions

Reaction Steps

Methylcyclohexane (dried with molecular sieves) of 589 mL, n-butyl chloride (dried with molecular sieves) of 613 mL, and cumyl chloride of 0.550 g were added to a 2 L reaction container having an agitator. After cooling the reaction container to −70° C., α-picoline (2-methylpyridine) of 0.35 mL and isobutylene of 179 mL were added. Titanium tetrachloride of 9.4 mL was further added, and the polymerization was stared. The solution was agitated at −70° C. and allowed to react for 2.0 hours. Next, styrene of 59 mL was added to the reaction container, and the reaction was continued for 60 minutes. After that, a large amount of methanol was added to stop the reaction. After a solvent and the like were removed from the reaction solution, the polymer was dissolved in toluene and washed twice. The toluene solution was added to a methanol mixture to deposit the polymer, and the obtained polymer was dried at 60° C. for 24 hours to obtain a styrene-isobutylene diblock copolymer.

Provenance & Evidence