辐照交联丁腈橡胶/氯醚橡胶共混胶的性能研究

Properties of Irradiation Crosslinked NBR/ECO Blend

研究辐照敏化剂种类和用量对辐照交联丁腈橡胶(NBR)/氯醚橡胶(ECO)共混胶性能的影响,以及防护体系对共混胶耐热老化性能的影响。结果表明:与辐照敏化剂TAIC相比,辐照敏化剂TMPTMA对NBR/ECO共混胶的交联效果更佳;随着辐照剂量的增大,共混胶的交联度增大,邵尔A型硬度和拉伸强度增大,拉断伸长率减小,但当辐照剂量大于140 kGy后,共混胶的交联度变化很小;采用防老剂RD/NBC并用(并用比为1/1)的共混胶的耐热老化性能最佳。

The effects of the type and amount of radiation sensitizer on the properties of irradiation crosslinked nitrile rubber(NBR)/epichlorohydrin rubber(ECO)blend and the effects of anti-aging systems on the heat aging resistance of the blend were studied.The results showed that the crosslinking effect of radiation sensitizer TMPTMA on NBR/ECO blend was better than that of radiation sensitizer TAIC.With the increase of radiation dose,the crosslinking degree of the blend increased,the shore A hardness and tensile strength were improved,and the elongation at break was reduced.However,when the radiation dose was higher than 140 kGy,the crosslinking degree of the blend changed little.The heat aging resistance of the blend with antioxidant RD/NBC blend(blending ratio was 1/1)was the best.