Alkyl terminated polyether was prepared in high yield by using sodium methoxide as alkaline reagent and methyl chloride as alkyl terminated reagent. The structures of the products were characterized by means of infrared spectroscopy ( IR) , nuclear magnetic resonance ( NMR) and gel permeation chromatography ( GPC) . Compared the physical and chemi-cal properties of the alkyl terminated polyether with unsealed polyether, it was found that the alkyl terminated polyether has lower viscosity and higher viscosity index. The anti-oxidation performances of the two kinds of polyether were investigated by rotary oxygen bomb test method ( ROBT) . By the study of the suitability of different antioxidants in two kinds of poly-ether, the antioxidant suitable for alkyl terminated polyether was developed, which can make the ROBT reach to 1950 mi-nutes.%以甲醇钠作为碱性试剂,一氯甲烷为封端试剂,高产率制备了烷基封端聚醚. 并通过红外光谱( IR)、核磁共振( NMR)和凝胶渗透色谱( GPC)对其进行表征. 对比了两种聚醚的指标变化,结果发现,封端聚醚具有更低的黏度、更高的黏度指数. 利用旋转氧弹测试方法考察了封端聚醚与未封端聚醚的抗氧化性能,通过考察不同抗氧剂在两种聚醚中的适应性,开发了适合封端聚醚的抗氧体系,该抗氧体系可以使封端聚醚的旋转氧弹时间达到1950 min.
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