Reaktion #163425

Reaktionsgleichung

methylcyclohexane

cumyl chloride

isobutylene

styrene

→

styrene isobutylene

Lösungsmittel

n-butyl chloride

Reaktionsbedingungen

Aufarbeitung

1. 1
   SonstigeIn a 2 L reaction vessel
2. 2
   Sonstigeequipped with a stirrer
3. 3
   Sonstigethe solution was reacted for 2.0 hours
4. 4
   Sonstigethe reaction was terminated
5. 5
   workup.ADDITIONby adding a large amount of methanol
6. 6
   SonstigeAfter removing the solvent from the reaction solution
7. 7
   workup.DISSOLUTIONa polymer was dissolved in toluene
8. 8
   Waschenwashed twice with water
9. 9
   workup.ADDITIONThis toluene solution was added to the methanol mixture
10. 10
    Sonstigeprecipitating a polymer
11. 11
    Trocknenthe resultant polymer was dried at 60° C. for 24 hours

Vorschrift

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 added. After cooling the reaction vessel to −70° C., 0.35 mL of α-picoline(2-methylpyridine) and 179 mL of isobutylene were added. Furthermore, 9.4 mL of titanium tetrachloride was added and the polymerization was initiated, and then the solution was reacted for 2.0 hours while stirring at −70° C. Next, 59 mL of styrene was added to 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 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.

Quelle