Wang Liquan, Lin Jiaping, Zhang Liangshun
Key Laboratory for Ultrafine Materials of the Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China.
Langmuir. 2009 Apr 21;25(8):4735-42. doi: 10.1021/la803908e.
Using the real-space implemented self-consistent field theory, we undertook an investigation on the hierarchical self-assembly behaviors of comb-coil block copolymers. The comb-coil block copolymers can self-assemble into hierarchical microstructures with two different length scales. Various structure-within-structure morphologies, such as parallel and perpendicular lamella-within-lamella, cylinder-within-lamella, lamella-within-cylinder, and cylinder-within-cylinder, were observed. In the hierarchical structures, the large-length-scale structures are produced by segregation between the coil blocks and comb blocks, and the small-length-scale structures are formed by microphase separation within the comb blocks. Effects of interaction strength and coil block length on the hierarchical phase behaviors were studied, and the phase diagram was mapped out accordingly. Furthermore, the large-length-scale lamellar period as a function of interaction strength was examined. It was found the lamellar periods are greatly dependent on interaction strengths.
利用实空间实现的自洽场理论，我们对梳状-线团嵌段共聚物的分级自组装行为进行了研究。梳状-线团嵌段共聚物能够自组装成具有两种不同长度尺度的分级微观结构。观察到了各种结构套结构的形态，如平行和垂直的片层套片层、片层套圆柱、圆柱套片层以及圆柱套圆柱。在分级结构中，大长度尺度结构是由线团嵌段和梳状嵌段之间的相分离产生的，而小长度尺度结构是由梳状嵌段内的微相分离形成的。研究了相互作用强度和线团嵌段长度对分级相行为的影响，并据此绘制了相图。此外，还考察了大长度尺度片层周期作为相互作用强度的函数关系。发现片层周期很大程度上依赖于相互作用强度。
