Styrene → Styrene-butadiene-styrene

Participants

Reaction Steps

The 5400 g of cyclohexane, 7.4 millimoles of n-butyl lithium and 252 millimoles of tetrahydrofuran (THF) were charged in 10 L of a heater equipped with a stirrer. Then, 96 g of styrene was added and the polymerization was conducted at 45° C. Then, after the polymerization, the 400 g of 1,3-butadiene was added for the reaction. After the reaction, 96 g of styrene was added for the further polymerization, and the solution was placed inside the tank sealed with nitrogen. The above same polymerization steps were repeated and the reactants were placed inside the same tank sealed with nitrogen. After mixing, an SBS (styrene-butadiene-styrene) tri-block copolymer solution with solid content of 9.7% and weight average molecular weight of 230,000 can be obtained.

Provenance & Evidence