3.8. Surface dispersion
Figs. 13 and 14 show the surface dispersion image at 1000 according to changes in the HNBR blend content. Fig. 13 shows a phase separation phenomenon in the blended sample, whereas Fig. 14 does not, because the surface tension of FKM was higher
than that of HNBR. The FKM and HNBR blend effect developed by adding a compatibilizer. Adding a reinforcing agent (VN2) increased dispersion than it was not added.