Abstract: The microphase separation of symmetric diblock copolymer under three-dimensional confinement was studied with dynamic density functional theory(DDFT). The confinement structure is randomly distributed microspheres in space with maximum volume fraction of 0.6. The effects by varying the block copolymer chain length and the microsphere size on the microphase morphologies were discussed. Moreover, the preferentially attractive interaction between block A and the microsphere surface was considered, which takes great effects on the microphase orientation under the confinement.

Key words: Microphase separation, Three-dimensional confinement, Dynamic density functional theory