Theoretical Study on the Phase Behavior of Amphiphilic Triblock Copolymers PEO-PPO-PEO in Aqueous Solutions

Acta Chimica Sinica ›› 2007, Vol. 65 ›› Issue (9): 860-866. Previous Articles Next Articles

Original Articles

双亲三嵌段共聚物PEO-PPO-PEO在水溶液中相行为的理论研究

蒋润¹, 金庆华*^,1, 李宝会¹, 丁大同¹, 史安昌²

(¹南开大学物理系天津 300071)
(²加拿大McMaster大学物理和天文系)

投稿日期:2006-10-23 修回日期:2006-12-08 发布日期:2007-05-14
通讯作者: 金庆华

Theoretical Study on the Phase Behavior of Amphiphilic Triblock Copolymers PEO-PPO-PEO in Aqueous Solutions

JIANG Run¹; JIN Qing-Hua*^,1; LI Bao-Hui¹; DING Da-Tong¹; SHI An-Chang²

(¹Department of Physics, Nankai University, Tianjin 300071)
(²Department of Physics and Astronomy, McMaster University, Hamilton, Ontario L8S 4M1, Canada)

Received:2006-10-23 Revised:2006-12-08 Published:2007-05-14
Contact: JIN Qing-Hua

Abstract

The effects of the molecular weight on the phase behavior of amphiphilic triblock copolymers PEO-PPO-PEO in aqueous solutions were studied by using the self-consistent mean-field theory formulated in reciprocal space. The theoretical study predicted the stability ranges of various lyotropic liquid crystalline phases. By systematically varying the molecular weight, phase diagrams of several PEO-PPO-PEO triblock copolymers in water were constructed. Moreover, the effects of the block copolymer molecular weight on the volume fraction profiles for the components in the self-assembled structures were investigated. It was found that an increased molecular weight increased the segregation among the components at the given temperature. Good agreements were found between experimental results and theory.

Key words: self-consistent mean-field theory, triblock copolymer, molecular weight, phase segregation

Cite this article

JIANG Run; JIN Qing-Hua*^,1; LI Bao-Hui; DING Da-Tong; SHI An-Chang². Theoretical Study on the Phase Behavior of Amphiphilic Triblock Copolymers PEO-PPO-PEO in Aqueous Solutions[J]. Acta Chimica Sinica, 2007, 65(9): 860-866.

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双亲三嵌段共聚物PEO-PPO-PEO在水溶液中相行为的理论研究

Theoretical Study on the Phase Behavior of Amphiphilic Triblock Copolymers PEO-PPO-PEO in Aqueous Solutions

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