**3. Characterization of SiR–EPDM blends**

### **3.1. Dielectric characterization**

In order to analyze the dielectric behavior of SiR–EPDM blends in harmful environments, blends have been tested as per ASTM/IEC standards.

### *3.1.1. Breakdown voltage and dielectric strength*

As per standard ASTM D 149 (IEC 60243), BDV and DS were measured. The sample dimen‐ sions of 5 × 5 × 0.3 cm were placed between two electrodes, and the voltage was increased at a fixed rate of 500 V/s. The voltage at which dielectric breakdown occurs was measured as BDV. DS was calculated.
