反应详情

A 5-liter stainless steel autoclave is purged with nitrogen and then is charged with a mixture of 70 g of styrene, 2053 g of cyclohexane and 210 g of butadiene. Afterwards, the autoclave is heated in a water bath under stirring to reach a temperature of 50° C. and at that temperature, butyllithium is added to remove the impurities reactive to the initiator, followed by 8.4 mmol of the tin-containing organolithium initiator from Example 63. The reaction mixture is allowed to react for 2 hours and then 10 ml of methanol and 1.6 g of 2,4-di-tert.-butyl-4-methylphenol are added. The content of the autoclave is discharged, and coagulated with steam to remove the solvent and the regulator, then dried to a constant weight. GPC measurements show that the polymer obtained has a weight average molecular weight of 120,000, a number average molecular weight of 110,000, and a molecular weight distribution of 1.09.

1. customA 5-liter stainless steel autoclave is purged with nitrogen
2. additionis charged with a mixture of 70 g of styrene, 2053 g of cyclohexane and 210 g of butadiene
3. temperatureAfterwards, the autoclave is heated in a water bath
4. customa temperature of 50° C.
5. additionat that temperature, butyllithium is added
6. customto remove the impurities
7. customto react for 2 hours
8. customto remove the solvent
9. customthe regulator, then dried to a constant weight
10. customobtained