三元乙丙橡胶和丁腈橡胶的高温撕裂强度研究

研究不同温度下三元乙丙橡胶（EPDM）和丁腈橡胶（NBR）的撕裂强度。结果表明：EPDM和NBR胶料的撕裂强度随温度升高而降低，基本符合阿累尼乌斯方程式，常温下撕裂强度约为高温下撕裂强度的4倍；通过常温与高温下的撕裂强度之比（常热比），可由常温撕裂强度直接推算高温撕裂强度；天然橡胶（NR）具有较高的高温撕裂强度，并用NR可以提升其他胶种的高温抗撕裂性能。;The tear strength of EPDM and NBR at different temperatures was studied.The results showed that the tear strength of EPDM and NBR compound decreased as temperature increasing，which basically conformed to Arrhenius equation.The tear strength at room temperature was about four times of that at high temperature.Through the ratio of the tear strength at room temperature to high temperature（room to high temperature tear strength ratio），the tear strength at high temperature could be directly calculated from the tear strength at room temperature.NR had higher tear strength at high temperature，so the tear resistance of other kinds of rubber at high temperature could be improved by blending NR