非离子表面活性剂NeodoL_(25-9)/H_2O二元体系的相行为研究

用低温差热分析仪和偏光显微镜研究了工业品级的脂肪醇聚氧乙烯醚NeodoL25-9／H2O二元体系在0℃～100℃范围内的相行为，并与文献资料的C12EO8（纯度：99％），在同样条件下的相行为进行了比较．结果表明，NeodoL25-9在整个相区内无V1相（双连续的立方相），有层状相和六角相两相共存区，I1相区较小，整个液晶区明显大于C12EO8起始浊点低于C12EO8，但浊点曲线的斜率较大。

The phase behaviour of industrial grade alcohol ethoxylate NeodoL25-9/H2O system has been studied by using polarized light microscope and differential thermometer over temperature range 0℃～100℃. Compared with pure c12EO8,liquid crystal domain is much larger,and cubic - spherical - micelles(I1) domain is smaller. The normal - cubic bicontinuous (V1 ) hasn't been observed. The coexistent domain of lamellar(La) and hexagonal (H1) appears. The first cloud point is lower than C12EO8,but the slope of cloud point curve is larger.