知识与财富的链接
以2,6-二叔丁基苯酚原料,合成了1种新型受阻酚抗氧剂2,6-二叔丁基-4-氨基苯酚,研究了该新型抗氧剂对聚烯烃材料的抗氧化作用。结果表明,以锌粉为还原剂,8.5 %氯化钙水溶液用量为90 mL,溶剂乙醇用量为100 mL, 在80 ℃下反应8 h,新型受阻酚抗氧剂的产率达80 %以上,熔程为112.2~113.3 ℃。该抗氧剂在2种聚烯烃材料中均具有良好的加工稳定性和抗氧化性能,氧化诱导期与市售抗氧剂1076相当,优于抗氧剂BHT;经5次挤出后,添加新型抗氧剂的聚烯烃材料的熔体流动速率变化很小,但拉伸强度和断裂伸长率大幅度提高。
A novel hinderd phenolic antioxidant 2,6-di-tert-butyl-4-aminophenol was synthesized with 2,6-di-tert-butylphenol as a raw material. When zinc powder was used as a reducing agent, ethanol as a solvent was 100 mL, the amount of calcium chloride solution was 90 mL, the reaction temperature was 80℃ and the reaction time was 8 h, the yield of the product reached 80 % and its melting point was between 112.2 ℃and 113.3 ℃. When loaded in polyolefin resins, the anti-oxidation property of the novel one was equal to antioxidant 1076 and was superior to antioxidant BHT. After 5 times extrusion, the melt flow rate of the two polyolefins containing the novel antioxidant changed a little, and the tensile strength and the elongation at break increased.
