In a study on the phase separation structure of the FKM/HNBR
blend by Hirano et al. [6], atomic force microscopy [7] and
Transmission Electron Microscopy (TEM) [8] were employed in a
blend analysis and resulted in a phase separation phenomenon at
the FKM/HNBR ratio of 30:70. Kader and Bhowmick, in their study
on a commercial blend of acrylate rubber and FKM [9], reported
a phase-dissolution by Differential Scanning Calorimetry (DSC)
and Dynamic Mechanical Thermal Analyzer measurements. As
such, there are resources on the FKM and HNBR blend, but no
studies on phase-dissolution of the FKM/HNBR blend. Accordingly, we examined the FKM/HNBR blend characteristics using a
compatibilizer.