Polyether ester polyol, preparation method thereof and method for preparing polyurethane elastomer by using polyether ester polyol

The invention relates to polyether ester polyol which comprises a repeated structure shown in a formula (1) and a blocked alcoholic hydroxyl group: # imgabs0 #, wherein R1 is selected from at least one of aromatic rings or aromatic heterocyclic rings, and the mass content of R1 in the repeated structure shown in the formula (1) is 4.5%-44%; r2 is selected from at least one of saturated alkanes with the carbon atom number of 2-5; x is 2 to 20; the mass percent of the repeated structure in the formula (1) in the polyether ester polyol is greater than 75%; the average functionality of the hydroxyl group of the end-capped alcohol is 1.95 to 2.00; the number average molecular weight of the polyether ester polyol is 800 to 5000. The invention also relates to a preparation method of the polyether ester polyol and a method for preparing polyurethane elastic fibers or elastomers by using the polyether ester polyol. 本申请涉及一种聚醚酯多元醇，其包含重复的式(1)结构和封端醇羟基：#imgabs0#其中R1选自芳香环或芳杂环中的至少一种，且R1在重复的式(1)结构中的质量含量为4.5％～44％；R2选自碳原子数为2-5的