Styrene → Styrene-butadiene-styrene

Participants

Reaction Steps

Styrene, butadiene and styrene were consecutively polymerized in a cyclohexane solvent in the presence of s-butyllithium and TMEDA in the same manner as in Referential Example 2, to give a styrene-butadiene-styrene block copolymer. The thus-obtained block copolymer was hydrogenated in the same manner as in Referential Example 2, to give a hydrogenated block Copolymer No. 3 (the hydrogenated block copolymer obtained in Referential Example 4 will be abbreviated as “Copolymer No. 3” hereinafter). Table 3 shows a styrene content, a number average molecular weight, a vinyl bond content and a hydrogenation ratio of the obtained Copolymer No. 3.

Provenance & Evidence