반응 #415503

반응 방정식

isoprene

sec-butyl lithium

styrene

benzene

→

styrene-isoprene

용매

tetrahydrofuran

methanol

반응 조건

후처리

1. 1
   workup.ADDITIONby adding 0.42 ml
2. 2
   기타at room temperature
3. 3
   기타to polymerize for 2 hours
4. 4
   기타yielding 27.5 g

실험 절차

An AB block polymer of styrene-isoprene was prepared by adding 0.42 ml. of 1.18 N sec-butyl lithium to a mixture of 10 g. styrene of 175 ml. of benzene and 5 ml. of tetrahydrofuran at room temperature. The mixture was allowed to polymerize for 2 hours and 40 g. of dry air-free isoprene was added and the polymerization continued for 2 additional hours. The product was isolated by precipitation into methanol, yielding 27.5 g. of block polymer dispersant.

출처