The critical micelle concentration (CMC) of three kinds of polyoxyethylene-polyoxypro-pylene block copolymer-L64, AE21, AP221 has been measured by surface tension and ben-zopurpurine uptake.

• 本实验采用表面张力法,苯红紫可见光吸收法测定L64,AE32,AP221等三种不同结构的聚氧乙烯-聚氧丙烯嵌段共聚物的临界胶束形成浓度CMC,发现L64与AE32在低浓度下形成单分子胶束,在高浓度下形成聚集胶束。