Abstract: Development of high efficient, environmentally friendly, low cost as well as multifunctional rubber antioxidants has been widely focused on. In this article, a new type Schiff base rubber antioxidant with combined advantages of hindered phenol and hindered amine antioxidants has been synthesized and applied in the natural rubber. The influence of the new synthesized rubber antioxidant on vulcanized performance, physical and mechanical properties, thermal stability and thermal aging kinetic was investigated in the thermal aging process of vulcanized natural rubber. The results showed that the synthesized antioxidant obviously shortened the curing time tC90 and improved the cure rate. Meanwhile, it exhibited better protective effect for thermal oxygen aging performance of NR vulcanizates, compared to the antioxidant traditional BHT.

Key words: Rubber antioxidant,    ,  Vulcanized rubber,   , Thermooxidative stability,    ,  Thermal aging kinetic

摘要： 橡胶防老剂正朝着高效、 环保、 低成本以及多功能化或者多功能一体化的方向发展。研究开发了一 种集受阻酚与受阻胺防老剂优点于一体的新型席夫碱类防老剂, 并将其应用于天然橡胶中。考察新型防老剂对天 然橡胶硫化胶热氧老化过程中硫化性能、 物理机械性能、 热氧稳定性和热氧老化动力学的影响。结果表明, 合成的 新型酚胺防老剂具有明显的缩短硫化时间tC 9 0、 提高硫化速度的特性, 对 NR硫化胶的热氧老化有较好的防护效果, 明显优于防老剂BHT。

关键词: 橡胶防老剂,  , 硫化胶, 热氧稳定性, 热氧老化动力学