高等学校化学学报 ›› 2010, Vol. 31 ›› Issue (3): 566.

• 研究论文 • 上一篇    下一篇

棒-棒二嵌段共聚物自组装行为的自洽场研究

韩向刚, 张程祥   

  1. 吉林大学物理学院, 长春 130023
  • 收稿日期:2009-06-10 出版日期:2010-03-10 发布日期:2010-03-10
  • 通讯作者: 张程祥, 男, 教授, 主要从事高分子物理理论方面的研究. E-mail: zhangcx@jlu.edu.cn

Study on Self-assemble of Rod-rod Diblock Copolymers with Self-consistent Field Lattice Model

HAN Xiang-Gang, ZHANG Cheng-Xiang*   

  1. College of Physics, Jilin University, Changchun 130023, China
  • Received:2009-06-10 Online:2010-03-10 Published:2010-03-10
  • Contact: ZHANG Cheng-Xiang

摘要:

利用格子自洽场模型, 模拟了棒-棒二嵌段共聚物熔体系统的自组装行为, 并与线-棒二嵌段共聚物系统性质进行了对比. 结果表明, 棒-棒二嵌段共聚物系统的有序无序转变临界点低于线-棒二嵌段共聚物系统的相变临界点. 通过模拟计算, 发现薄层交叠柱状相、柱状相、层状相和Z形层状相4种稳定的有序形貌. 薄层交叠柱状相和柱状相仅在有序无序转变曲线的边缘位置出现, 层状相也仅存在于有序无序转变临界点上面的一小块区域内, 而稳定的Z形层状结构则占据了相图中较强相互作用的大部分区域.

关键词: 高分子熔体; 二嵌段共聚物; 自组装

Abstract:

The self-assemble behavior of the rod-rod diblock copolymers was studied by means of self-consistent field lattice model, and the results were compared with the coil-rod diblock copolymers. It is shown that the order-disorder transition point of rod-rod diblock copolymers is lower than that of coil-rod diblock copolymers. Four stable structures are obtained, i.e., overlapping cylinders, cylinders, lamellae and zigzag lamellae. The overlapping cylinders and cylinders occur only in the region near the order-disorder transition curve. Lamellae are observed in the region above the order-disorder transition point. However, the stable zigzag lamella structure occupies a big region corresponding to the strong interaction between two different components of diblock copolymers.

Key words: Polymer melt; Diblock copolymer; Self-assemble

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