Abstract: A series of polyoxyethylene azo disperse dye and their intermediates are analyzed.Their structure and colour properties are studied with MS, ¹H NMR and UV/VIS spectra.MS spectra reveal that the ethoxylated azo dyes are a mixture of compounds with similar body structure but differ in polyoxyethene chain length.The influence on the ε _mol values of the polyoxyethylene dye is observed.

摘要： 采用质谱、紫外等手段对偶氮型聚氧乙烯醚染料及其中间体进行了结构与发色状况研究 .偶氮染料接枝聚氧乙烯醚链后为具有相似结构、不同环氧乙烷平均加成数的同系混合物 ,聚氧乙烯醚链长短对其紫外吸收影响很小 ,紫外最大吸收λ_max基本不变 ,染料的发色强度ε_mol随着聚氧乙烯醚链增长而降低 ,其酸、碱变色性质与偶合组分的结构有关 .