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．

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 vulcanizates 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.