The basic materials in this research and their sources are
styrene–butadiene rubber (SBR-1502) provided by Poliran Co.,
Iran, with density 1.04 (g/cm3) and Mooney viscosity 40–50
(ML1+4, 100 1C). Ribbed smoked sheets in the name of RSS1 from
Malaysia were used as natural rubber with density 0.95 (g/cm3)
and Mooney viscosity 84 (ML1+4, 100 1C). The solvent ethanol
was of commercial grade with density 0.789 g/cm3 and supplied
by local chemical suppliers. Brake oil DOT4 was provided
by Fouman Shimi Co., Iran, with kinematic viscosity 2.1 cSt @
100 1C and paraffinic rubber processing oil Behran 840 was
obtained from Behran Oil Co., Iran, with kinematic viscosity 5.1
St @ 100 1C