Science. 1995 Jun 23;268(5218):1728-31. doi: 10.1126/science.268.5218.1728.
The observation by transmission electron microscopy of six different stable aggregate morphologies is reported for the same family of highly asymmetric polystyrene-poly-(acrylic acid) block copolymers prepared in a low molecular weight solvent system. Four of the morphologies consist of spheres, rods, lamellae, and vesicles in aqueous solution, whereas the fifth consists of simple reverse micelle-like aggregates. The sixth consists of up to micrometer-size spheres in aqueous solution that have hydrophilic surfaces and are filled with the reverse micelle-like aggregates. In addition, a needle-like solid, which is highly birefringent, is obtained on drying of aqueous solutions of the spherical micelles. This range of morphologies is believed to be unprecedented for a block copolymer system.
透射电子显微镜观察到六种不同的稳定聚集形态，这些聚集形态均来自于同一组高度不对称的聚苯乙烯-聚（丙烯酸）嵌段共聚物，共聚物是在低分子量溶剂体系中制备的。这六种形态中，有四种在水溶液中分别为球体、棒体、层片和囊泡，第五种形态为简单的反向胶束状聚集体，第六种形态为在水溶液中具有亲水性表面且充满反向胶束状聚集体的最大可达微米级的球体。此外，在干燥球形胶束的水溶液时，可得到具有高度双折射的针状固体。这一系列形态被认为是嵌段共聚物体系前所未有的。
