The coupling reaction of butadiene-styrene anionic living coploymerization system with acryloyl chloride (AC) in extracted oil have been studied．Various factors related to the coupling reaction

such as AC／BuLi(mole ratio)

reaction time

reaction temperature

relative molecular weight of the living copolymer

amount of THF

end group ot the living copolymer

monomer concentration

were investigated．Coupling efficiency and branching number were dramatically effected by AC／BuLi(mole ratio)；when 0.7≤AC／BuLi≤10

the coupling efficiency was higher than 50％ and the average branching number was higher than 3；while AC／BuLi was less than 0.7 or higher than 10

the obtained polymer was with poor coupling efficiency and the branching number was decreased．Coupling efficiency was decreased when the molecular weight of living copolymer or the temperature of coupling reaction was increased；coupling efficiency was increased while the time of coupling reaction or the amount of THF was increased；the monomer concentration was little effect on coupling efficiency；when the end group of the living copolymer was butadiene

the resulted polymer was with higher coupling efficiency but lower branching number；when the end group of the living copolymer was styrene

the obtained polymer was with lower coupling efficiency but higher branching number．The optimism conditions of the coupling reaction were established

that is AC／BuLi=0.7～10(mole ratio)

reaction time 60 min

reaction temperature 50～70℃

THF／BuLi≤50(mole ration)

[M]=11 wt％

the branching number and the coupling efficiency of the obtained polymer were 2.3～8.0 and 50％～80％ respectively．