Results for Bilayer Rubber Compounds

A bilayer system is made of two rubber compounds with the same thickness, which are cured simultaneously under the same conditions 170°C and the heating system of the mold placed at the mold surface in contact with the rubber. 

Two rubber compounds are selected whose thermal and kinetic parameters are shown in Table 4.1. These rubber compounds differ only in the value of the percent sulfur and the corresponding value of the cure enthalpy. 

The cure enthalpy is 14 J/g for the first rubber compound, called rl, and 56.7 J/g for the second rubber compound called r2. 

The profiles of temperature are similar in the two rubber sheets for two reasons the thermal parameters are the same for the rubbers rl and r2, and the internal heat evolved from the low cure enthalpy has a little effect. 

The bilayer rubber sheet is heated in a mold with the heating systan acting at the mold-rubber interface, so that the temperature on the rubber surfaces is almost that of the mold. 

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