10212 複合材料のためのスチレン系共重合ポリマーナノファイバーの作製(OS3-3【高分子系複合材料の成形と力学特性(3)】)

Abstract

The styrene-isoprene-styrene (SIS) triblock copolymer nanofibers were fabricated for the dispersed phase of a composite using electrospinning. A mixed solvent of toluene and N, N-dimethylformamide (DMF) was selected and used, and the mixing ratio of toluene/DMF was varied from 100/0 to 50/50. Nanofibers with an average lowest diameter of 350 nm were obtained at the mixing ratio of 50/50. The solution used in the electrospinning was rheologically investigated, which became gel as the amount of DMF increased. This could be attributed to the increase in the interaction between SIS molecules with the increasing amount of DMF that was a poor solvent for SIS. In addition, the electrical conductivity of the solvent remarkably increased as the amount of DMF increased. The slightly stronger interaction between SIS molecules and the high electrical conductivity could contribute to the formation of homogeneous and thin fibers.