中国物理B ›› 2013, Vol. 22 ›› Issue (2): 26401-026401.doi: 10.1088/1674-1056/22/2/026401

• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇    下一篇

Phase behaviors in binary mixture of diblock copolymers confined between two parallel walls

潘俊星, 张进军, 王宝凤, 武海顺, 孙敏娜   

  1. School of Chemistry and Materials Science, Shanxi Normal University, Linfen 041004, China
  • 收稿日期:2012-04-14 修回日期:2012-07-09 出版日期:2013-01-01 发布日期:2013-01-01
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 20673070); the Natural Science Foundation of Shanxi Province (Grant No. 2007011055); the Natural Science Foundation for Young Scientists of Shanxi Province (Grant No. 2011021008-1); and the Soft Science Program of Shanxi Province (Grant No. 2011041015-01).

Phase behaviors in binary mixture of diblock copolymers confined between two parallel walls

Pan Jun-Xing (潘俊星), Zhang Jin-Jun (张进军), Wang Bao-Feng (王宝凤), Wu Hai-Shun (武海顺), Sun Min-Na (孙敏娜 )   

  1. School of Chemistry and Materials Science, Shanxi Normal University, Linfen 041004, China
  • Received:2012-04-14 Revised:2012-07-09 Online:2013-01-01 Published:2013-01-01
  • Contact: Zhang Jin-Jun E-mail:zhangjinjun@sxnu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 20673070); the Natural Science Foundation of Shanxi Province (Grant No. 2007011055); the Natural Science Foundation for Young Scientists of Shanxi Province (Grant No. 2011021008-1); and the Soft Science Program of Shanxi Province (Grant No. 2011041015-01).

摘要: The phase behaviors in binary mixture of diblock copolymers confined between two parallel walls are investigated by using cell dynamics simulation of the time-dependent Ginzburg-Landau theory. The morphological dependence of the wall-block interaction and the distance between walls (confinement degree) has been systematically studied, and the effect of repulsive interactions between different monomers is also discussed. It is interesting that multiple novel morphological transitions are observed by changing these factors, and various multilayered sandwich structures are formed in the mixture. Furthermore, the parametric dependence and physical reasons for the microdomain growth and orientational order transitions are discussed. From the simulation, we find that much richer morphologies can form in binary mixture of diblock copolymers than those in pure diblock copolymer. Our results provide an insight into the phase behaviors under parallel walls confinement and may provide guidance for experimentalists. This model system can also give a simple way to realize orientational order transition in soft materials through confinement.

关键词: parallel walls confinement, phase behavior, binary mixture, diblock copolymer

Abstract: The phase behaviors in binary mixture of diblock copolymers confined between two parallel walls are investigated by using cell dynamics simulation of the time-dependent Ginzburg-Landau theory. The morphological dependence of the wall-block interaction and the distance between walls (confinement degree) has been systematically studied, and the effect of repulsive interactions between different monomers is also discussed. It is interesting that multiple novel morphological transitions are observed by changing these factors, and various multilayered sandwich structures are formed in the mixture. Furthermore, the parametric dependence and physical reasons for the microdomain growth and orientational order transitions are discussed. From the simulation, we find that much richer morphologies can form in binary mixture of diblock copolymers than those in pure diblock copolymer. Our results provide an insight into the phase behaviors under parallel walls confinement and may provide guidance for experimentalists. This model system can also give a simple way to realize orientational order transition in soft materials through confinement.

Key words: parallel walls confinement, phase behavior, binary mixture, diblock copolymer

中图分类号:  (Phase separation and segregation in polymer blends/polymeric solutions)

  • 64.75.Va
64.75.Yz (Self-assembly) 83.80.Uv (Block copolymers) 83.80.Tc (Polymer blends)