计算物理 ›› 2013, Vol. 30 ›› Issue (2): 251-255.

• 论文 • 上一篇    下一篇

非对称线棒线ABA三嵌段共聚物自组装的自洽场研究

王彪1, 李云飞2, 韩向刚3   

  1. 1. 辽宁科技大学理学院, 辽宁 鞍山 114051;
    2. 沈阳工业大学辽阳校区基础部, 辽宁 辽阳 111003;
    3. 内蒙古科技大学数理与生物工程学院, 内蒙古 包头 014010
  • 收稿日期:2012-07-10 修回日期:2012-10-24 出版日期:2013-03-25 发布日期:2013-03-25
  • 作者简介:王彪(1978-),男,讲师,硕士,从事高分子物理统计理论研究,E-mail:wangbiaoliyunfei@126.com
  • 基金资助:
    国家自然科学基金(11147132)资助项目

Self-assembly of Asymmetric Coil-Rod-Coil ABA Triblock Copolymers:Self-consistent Field Study

WANG Biao1, LI Yunfei2, HAN Xianggang3   

  1. 1. School of Science, University of Science and Technology Liaoning, Anshan 114051, China;
    2. Department of Basic, Liaoyang Campus, Shenyang University of Technology, Liaoyang 111003, China;
    3. School of Mathematics, Physics and Biological Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, China
  • Received:2012-07-10 Revised:2012-10-24 Online:2013-03-25 Published:2013-03-25

摘要: 利用自洽场方法在三维空间模拟计算非对称型线/棒/线ABA三嵌段共聚物的自组装.在线棒嵌段体积比例相等的条件下,改变两端的线嵌段体积比例,观察到层状、螺旋状、条状和柱状结构.相分离相互作用参数随着一侧线嵌段体积比例增加而逐渐增大,并且当一侧线体积分数为0.05时,相行为最为丰富.随着相互作用参数增大,层状、螺旋和层状结构依次出现,这与相应的线/棒二嵌段共聚物是不同的;层状、螺旋、条状和柱状结构的出现与相应的对称线/棒/线三嵌段共聚物的自组装行为也不同.

关键词: 自洽场, 共聚物, 自组装, 相分离

Abstract: Self-assembly of asymmetric coil-rod-coil three block copolymers is simulated with self-consistent field theory in three dimensions. As volume proportions of coil and rod block equal each other, with change of volume fractions of aside coil, lamellar, gyroid, strip and cylindrical structures are observed. Interacion parameter at which phase separation occurs increases with volume fractions of aside coil. As volume fraction of aside coil equals 0.05, phase behaves especially rich. With increasing interacion parameter self-assembly structure change from lamellar into gyroid and then lamellar, which is different from coil-rod diblock copolymers. It is found that appearance of lamellar, gyroid, strip and cylindrical structures differs with corresponding coil-rod-coil symmetric tfiblock copolymers.

Key words: self-consistent field, copolymers, self-assembly, phase separation

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