中文摘要：

以镧和维生素C为原料制备了一种新型稀土配合物,将该新型稀土配合物作为一种新型防老剂应用于天然橡胶/炭黑（NR/CB）复合材料中,研究了该稀土配合物对NR/CB混炼胶硫化特性和硫化胶力学性能的影响,通过红外光谱、力学性能保持率及表面形貌变化详细分析了该稀土配合物对NR/CB硫化胶耐老化性能的影响,并与常用橡胶防老剂4010NA、RD和MB进行了比较.结果表明：维生素C-稀土配合物对NR/CB混炼胶具有一定的硫化促进作用,并能提高NR/CB硫化胶的力学性能;维生素C-稀土配合物在NR/CB复合材料中有优良的抗老化作用,其抗热氧老化和抗紫外光老化效果与4010NA、RD相近,优于MB,其抗臭氧老化性能尤为突出,显著优于RD、MB和具有突出抗臭氧性能的4010NA.

英文摘要：

A novel rare earth complex was prepared from lanthanum （La） and vitamin C and was used as a new type of antioxidant in natural rubber/carbon black （NR/CB） composites. Then, the effects of the vitamin C-rare earth complex on the curing characteristics of NR/CB compounds and the mechanical properties of NR/CB vulcani- zates were investigated. Moreover, by means of FT-IR and according to the retention of mechanical properties and the variation of surface morphology, the effects of the rare earth complex on the antiaging properties of the NR,/CB vulcanizates were also analyzed in detail and were compared with those of the commonly-used rubber antioxidants 4010NA, RD and MB. The results show that （ 1 ） the rare earth complex can accelerate the vulcanization of the NR/ CB compounds to a certain degree and improve the mechanical properties of the NR/CB vulcanizates; （2） the rare earth complex has a good antiaging effect on the NR/CB vulcanizates; （3） the thermo-oxidative aging resistance and UV aging resistance of the rare earth complex are close to those of 4010NA and RD and are superior to those of MB ; and （4） the ozone aging resistance of the rare earth complex is particularly strong for the NR/CB vulcanizates, which is superior to those of RD and MB as well as to those of 4010NA with an excellent ozone aging resistance.