受阻酚AO-80/AO-1035对丙烯酸酯橡胶阻尼性能的影响

Effect of hindered phenols AO-80/AO-1035 on damping properties of acrylate rubber

以2种不同结构的受阻酚AO-80和AO-1035为阻尼剂,考察了两者并用比对丙烯酸酯橡胶(ACM)阻尼性能、贮存稳定性及耐老化性能的影响。结果表明,受阻酚与ACM基体具有良好的相容性,硫化胶只有1个玻璃化转变温度(T_g),且随着受阻酚AO-80用量的增加,T_g逐渐升高;当2种受阻酚并用时,硫化胶的有效阻尼温域(损耗因子峰值不小于0. 5)大于单独使用一种受阻酚时,二者之间存在一定的协同作用,当AO-80/AO-1035(质量比)为45/15时,硫化胶的贮存稳定性最佳,有效阻尼温域达到31. 5℃;随着老化时间的延长,硫化胶的损耗因子峰值逐渐下降,有效阻尼温域变化不大,当AO-80/AO-1035为30/30时,硫化胶的耐老化性能最佳。

Two different structure hindered phenol AO-80 and AO-1035 were used as damping agents, and the effects of blending ratio of hindered phenols on the damping properties, storage stability and aging resistance of acrylate rubber （ACM） vulcani- zates were investigated. The results showed that the vulcanizates presented only one glass transition tem- peratures （Tg） , indicating the hindered phenol had a good compatibility with the. ACM matrix. With increase of hindered phenol AO-80, Tg shifted gradually toward higher temperature. When the two kinds of hindered phenols were blended, the effective damping temperature range（ the loss peak value no less than 0.5） of the vulcanizates was more than that of a single hindered phenol, exhibiting excellent synergistic effect. The storage stability of the vulcanizate was the best when the mass ratio of AO-80/ AO-1035 was 45/15, and the effective damping temperature was 31.5℃. With prolonging the aging time, the loss peak value of the vulcanizates decreased gradually, and the effective damping temperature range changed little. When the mass ratio of AO-80/AO-1035 was 30/30, the aging resistance was the best.