Sphere-forming diblock copolymers in slit confinement: A dynamic density functional theory study

被引:21
|
作者
Tan, Hongge [1 ]
Song, Qinggong [1 ]
Niu, Xiaohui [1 ]
Wang, Ziyu [2 ]
Gao, Wenfang [2 ]
Yan, Dadong [3 ]
机构
[1] Civil Aviat Univ China, Coll Sci, Tianjin 300300, Peoples R China
[2] Hebei Univ Technol, Coll Sci, Tianjin 300130, Peoples R China
[3] Chinese Acad Sci, BNLMS, Inst Chem, Beijing 100080, Peoples R China
来源
JOURNAL OF CHEMICAL PHYSICS | 2009年 / 130卷 / 21期
关键词
density functional theory; phase diagrams; polymer blends; polymer films; surface phase transformations; surface reconstruction; MONTE-CARLO SIMULATIONS; ASYMMETRIC BLOCK-COPOLYMERS; 2 HOMOGENEOUS SURFACES; ION MASS-SPECTROMETRY; CENTERED-CUBIC PHASE; THIN-FILMS; MICROPHASE SEPARATION; MESOSCOPIC DYNAMICS; MELTS; ORIENTATION;
D O I
10.1063/1.3141985
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
With mean-field dynamic density functional theory, we study the morphologies of sphere-forming diblock copolymers confined between two homogeneous surfaces. The effects of the film thickness and the surface field strength on the phase behavior of sphere-forming copolymer film are investigated. The morphologies deviating from the bulk sphere-forming structure are revealed, including cylinders oriented perpendicular to the surface, cylinders oriented parallel to the surface, perforated lamellae and lamellae by varying the film thickness, and surface field strength. We also construct the phase diagram of surface reconstruction, in which some interesting phase transitions are presented. Besides, we compare the present phase diagram with the relevant phase diagram of cylinder-forming block copolymer film.
引用
收藏
页数:7
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