تفاعل #426466

معادلة التفاعل

methylcyclohexane

cumyl chloride

a-picoline

isobutylene

styrene

→

styrene isobutylene

المذيبات

n-butyl chloride

ظروف التفاعل

المعالجة

1. 1
   أخرىIn a 2 L reaction vessel
2. 2
   أخرىequipped with a stirrer
3. 3
   أخرىpolymerization
4. 4
   أخرىthe solution was reacted for 2.0 hours
5. 5
   أخرىthe reaction was terminated
6. 6
   workup.ADDITIONby adding a large amount of methanol
7. 7
   أخرىAfter removing the solvent
8. 8
   workup.DISSOLUTIONthe like from the reaction solution, a polymer was dissolved in toluene
9. 9
   غسيلwashed twice with water
10. 10
    workup.ADDITIONThis toluene solution was added to the methanol mixture
11. 11
    أخرىprecipitating a polymer
12. 12
    تجفيفthe resultant polymer was dried at 60° C. for 24 hours

الإجراء التجريبي

In a 2 L reaction vessel equipped with a stirrer, 589 mL of methylcyclohexane (dried over molecular sieves), 613 mL of n-butyl chloride (dried over molecular sieves) and 0.550 g of cumyl chloride were charged. After cooling the reaction vessel to −70° C., 0.35 mL of a-picoline (2-methylpyridine) and 179 mL of isobutylene were added. Further, 9.4 mL of titanium tetrachloride was added to start polymerization, and then the solution was reacted for 2.0 hours while being stirred at −70° C. Next, 59 mL of styrene was added into the reaction vessel and the reaction was continued for 60 minutes, and then the reaction was terminated by adding a large amount of methanol. After removing the solvent and the like from the reaction solution, a polymer was dissolved in toluene and washed twice with water. This toluene solution was added to the methanol mixture, thereby precipitating a polymer, and the resultant polymer was dried at 60° C. for 24 hours to obtain a styrene-isobutylene diblock copolymer.

المصدر