カーボンブラックとのシリカナノフィラーの事前複合化がフィラー／ポリプロピレン系コンポジットの引張特性に及ぼす影響

抄録

The aim of the present study is to elucidate the possibility of improvement of filler dispersibility of polymer composite by using hybridized hydrophilic silica nanofillers with carbon black (CB) particles. The experimental techniques of the fabrication method of polypropylene (PP) composites were investigated on the basis of the strategy for the preparation of hybridized fillers of silica and CB, silica@CB fillers, having packing structure controlled as loosely as possible to enable easy peeling silica primary particle from CB to an isolated dispersed state at a blending stage with the polymer matrix, PP, melt. In addition to these PP composites fabricated by adding 2.5 vol% of the prepared silica@CB fillers directly, the tensile tests of the PP composites co-added with individual hydrophilic silica nanofillers and CB particles at the same volume fraction were also performed in this study. It was found that the hybridization of the nano-silica and CB particles used as fillers might improve the filler dispersibility and the tensile properties such as the stiffness, strength, and toughness of the PP composite system with these nano-silica and CB fillers.