A2B嵌段共聚物熔体的相分离

采用自洽场的方法对A2B共聚物熔体作了类似星形共聚物的处理，研究了该共聚物的相分离并给出了相图．与两嵌段共聚物的相图相比较而言，在A2B的相图中，只发现了三个经典的有序相：球状相、六角蜂窝形柱状相以及层状相．从两嵌段线形共聚物到Y形共聚物这一链结构上的变化使相图也发生了相应的改变：各相的相边界发生了很大的偏移并且层状相出现的区域被大大的拓宽了．因此，可以通过改变链的结构来控制高分子自组装的微相结构，从而代替传统的改变高分子链中各组分的比例．

Microphase Separation in A2B Copolymer Melts

The microphase diagrams of special A2B copolymer melts were presented by using the self-consistent field theory for star copolymer systems. Unlike the phase diagram of diblock copolymer, only three classical structures, namely spherical phase, cylindrical phase and lamellar phase were discovered in the diagram of the A2B system. The change in chain architectures allowed sufficient shifts of phase boundaries and widened the range of fB for which lamellar phase occurred, to some degree. Simply, an asymmetric architecture for copolymer allowed control of the morphology independent of the volume fraction.