反应详情

温度

40 °C

A stainless autoclave dried well and flushed with nitrogen was charged with 266 g of styrene and 2,500 g of cyclohexane. After the solution had been heated to 40° C., 3.5 mL of a 1.0 M hexane solution of n-butyllithium was added thereto, it was heated to 50° C. and reacted for 2 hours. 60 g of isoprene was then added as a cyclohexane solution and reacted for a further 2 hours. 266 g of styrene and 700 g of cyclohexane were then added and reacted for a further 2 hours. After the reaction was completed, 0.7 g of isopropanol was added to give a styrene-isoprene-styrene block copolymer. The average molecular weight obtained by GPC was 107,000, and the molecular weight distribution was 1.45.

1. customA stainless autoclave dried well
2. customflushed with nitrogen
3. additionwas charged with 266 g of styrene and 2,500 g of cyclohexane
4. addition3.5 mL of a 1.0 M hexane solution of n-butyllithium was added
5. temperatureit was heated to 50° C.
6. customreacted for 2 hours
7. customreacted for a further 2 hours
8. customreacted for a further 2 hours