文献类型：期刊文献

英文题名：Hierarchically Ordered Microstructures Self-Assembled from A(BC)_n Multiblock Copolymers

作者：Wang, Liquan[1];Lin, Jiaping[1];Zhang, Liangshun[1]

机构：[1]E China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai Key Lab Adv Polymer Mat, Key Lab Ultrafine Mat,Minist Educ, Shanghai 200237, Peoples R China

年份：2010

卷号：43

期号：3

起止页码：1602

外文期刊名：MACROMOLECULES

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000274268400061)】；

基金：This work was supported by National Natural Science Foundation of China (50925308). Support from projects of Shanghai municipality (09XD1401400. 0952 nm05100, 08DZ2230500, and B502) is also appreciated.

语种：英文

摘要：Using real-space self-consistent field theory, we explored hierachical microstuctures self-assembled from A(BC)(n) multiblock copolymers. The multiblock copolymers were classified into two types in terms of relative magnitude of A/B and A/C interaction strengths: one is that chi N-AB is less than or equal to chi N-AC, and the other is that chi N-AB is greater than chi N-AC. For both cases, the multiblock copolymers can self-assemble into hierachically ordered microstructures with two different length scales. For chi N-AB <= chi N-AC, various hierarchical microstructures, such as cylinders-in-lamellae(parallel to), lamellae-in-lamella(parallel to), cylinders-in cylinder(parallel to), and spheres-in-sphere(parallel to), were observed. In these microphases, the small-length-scale structures and the larger-length-scale structures are packed in the doubly parallel forms. It was found the number of internal small-length-scale structures can be tailored by tuning the number of BC block and the interaction strength between A and BC blocks. For chi N-AB > chi N-AC, in addition to the parallel packed hierarchical structures, the multiblock copolymers can self-organize into perpendicular packed hierarchical structures, in which the structures with small periods are arranged perpendicular to sturctures with large periods. These perpendicular packed hierachical structures were found to be only stable at higher value of chi N-BC.