【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.更多还原

【Abstract】 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.更多还原