**2. Materials and Methods**

The investigations were performed on NBR with two di fferent contents of ACN monomer. Arlanexo Deutschland GmbH (Dormagen, Germany) supplied Perbunan ® 3445F (34% ACN) and Perbunan ®1846F (18% ACN). The filler was CORAX ® N 550 carbon black (CB) from Orion Engineered carbons GmbH (Frankfurt/M., Germany). TDAE was used from Hansen & Rosenthal KG (Hamburg, Germany). Mesamoll ® was obtained from Lanxess Deutschland GmbH (Leverkusen, Germany) and bio-oils, and epoxidized ester of glycerol formal from soybean oil (EESO) and epoxidized ester of glycerol formal from canola oil (EECO) from Glaconchemie GmbH (Merseburg, Germany) were used.
