以环氧乙烷环氧丙烷为原料 ,Al( i- Bu) 3 - La( AA) 3 - H2 O为催化剂 ,合成了水溶性环氧乙烷 ( EO)和环氧丙烷 ( PO)的共聚物 ,考察了 EO- PO共聚物在水溶液中的性能 .实验结果表明 :当环氧乙烷与环氧丙烷的质量比在 4∶ 1～ 1 5∶ 1之间时 ,可合成出平均相对分子质量较高 ,且水溶性较好的 EO- PO共聚物 ;EO- PO共聚物的昙点随平均相对分子质量的增大、温度的升高、中性无机盐加入而降低 ,水溶液的粘度随平均相对分子质量的增大而增加 ,随温度的升高、中性无机盐、剪切速率的增大而降低 ,表现出假塑性流体的特征 . The copolymerization of water-soluble ethylene oxide (EO) and propylene oxide (PO) with ethylene oxide propylene oxide as raw material and Al (i- Bu) 3 - La (AA) 3 - The properties of EO-PO copolymer in aqueous solution were investigated.The experimental results show that when the mass ratio of ethylene oxide to propylene oxide is in the range of 4: 1 to 1: 5: 1, the average relative molecular weight Higher quality and better water solubility of EO-PO copolymer; EO-PO copolymer Tan points with the average relative molecular mass increases, the temperature increases, the neutral inorganic salts added to reduce the viscosity of the aqueous solution with The average relative molecular mass increases with increasing temperature, the neutral inorganic salt, shear rate increases and decreases, showing the characteristics of pseudoplastic fluid.