シリカ充てん系ゴム複合材料におけるフィラーゲルとゴムゲル
2004 年 77 巻 11 号 p. 375-381
詳細
2004 年 77 巻 11 号 p. 375-381
An examination was carried out on the quantitative analysis of bound rubber in silica-filled rubber systems by a thermal gravimetric analyzer (TGA), transmission electron microscopy (TEM) and pulsed NMR. The bound rubbers in solution mixed composites were primarily composed of filler gel which corresponded to the entrapped rubber phase in the agglomerate of silica particles. The amounts were well correlated with the averaged size of agglomerate of silica particles (Sagg) in the composites. The Sagg for mechanically mixed composites was 10-1 to 10-2 of Sagg for solution mixed composites. Thus, most of the bound rubbers in the mechanically mixed composites were composed of rubber gel which corresponded to the chemically cross-linked rubber phase in the composites. The difference of segmental mobility between filler gel and rubber gel was detected by pulsed NMR. The mobility was higher for rubber gel than for filler gel.
