繰返し変形を受けるゴムの温度変動に及ぼすカーボンブラックの影響

抄録

This study considers temperature variation of styrene butadiene rubbers (SBR) subjected to uniaxial tensile cyclic deformation. Contributions of the thermoelastic effect, the Gough-Joule effect as well as the energy dissipation to the amplitude and phase of temperature variation were examined quantitatively. The effect of carbon black (CB) filling on the temperature variation was also examined. Temperature amplitude was about 10 times larger for CB-filled SBR than for non-filled SBR. Phase difference of the temperature to the strain was about 180 degree for small deformation (thermoelastic effect dominant) while it was about 0 degree for large deformation (Gough-Joule effect dominant) regardless of CB filling. A transition region was observed between these two only for CB-filled SBR, which is mainly due to the energy dissipation. In addition, the temperature variation during one cycle was decomposed into reversible and irreversible components by assuming adiabatic condition. The reversible component corresponds to the sum of the thermoelastic effect and the Gough-Joule effect, while the irreversible component corresponds to the energy dissipation. The irreversible component was mainly observed for CB-filled SBR.