| 对称长链和近对称短链两嵌段聚合物混合体系相行为研究 |
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| 引用本文： | 吴志强,李宝会,金庆华,丁大同,史安昌.对称长链和近对称短链两嵌段聚合物混合体系相行为研究[J].高分子学报,2007(11):1035-1039. |
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| 作者姓名： | 吴志强 李宝会 金庆华 丁大同 史安昌 |
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| 作者单位： | 1. 南开大学物理系,天津,300071
2. 加拿大McMaster大学,物理和天文系,Hamilton L8S 4L8 |
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| 基金项目： | 国家自然科学基金
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教育部高等学校骨干教师资助计划 |
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| 摘 要： | 利用自洽平均场理论(SCMFT)系统地研究了对称长链和近对称短链两嵌段聚合物混合体系在纳米尺度下的自组装行为.体系中具有较高聚合度的对称长链熔体处于层状相,聚合度较低的近对称短链熔体处于无序相,而其混合体系却随着两种成分的不同比例呈现出有序-无序相转变、有序-有序相转变及有序-无序两相共存等复杂的相行为,计算结果与近期类似体系的实验有着较好的吻合.同时与两种对称的两嵌段聚合物混合体系的计算结果进行了比较,得出这两种体系的异同之处.
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| 关 键 词： | 两嵌段聚合物 混合体系 自组装 微观相分离 相行为 |
| 修稿时间： | 2007-01-04 |
STUDY OF THE PHASE BEHAVIOR OF BINARY BLENDS OF SYMMETRIC LONG AND NEARLY SYMMETRIC SHORT DIBLOCK COPOLYMERS |
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| WU Zhiqiang,LI Baohui,JIN Qinghua,DING Datong,SHI Anchang.STUDY OF THE PHASE BEHAVIOR OF BINARY BLENDS OF SYMMETRIC LONG AND NEARLY SYMMETRIC SHORT DIBLOCK COPOLYMERS[J].Acta Polymerica Sinica,2007(11):1035-1039. |
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| Authors: | WU Zhiqiang LI Baohui JIN Qinghua DING Datong SHI Anchang |
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| Institution: | 1 Department of Physics, Nankai University, Tianjin 300071;2 Department of Physics and Astronomy, McMaster University, Hamilton, Ontario L8 S 4 M 1, Canada |
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| Abstract: | The phase behavior of binary blends of symmetric long diblock copolymers and nearly short symmetric diblock copolymers with different ratio of chain lengths is studied using the self-consistent field theory.The occurrence of order-order transition,disorder-order transition and regions of order-disorder coexistence has been examined.Comparisons are also made with the theoretical study of the binary blend of symmetric long and short diblock copolymers and experiments on the similar systems.The effects of the short nearly symmetric diblock copolymer on the symmetric long diblock copolymer in their blends were analyzed. |
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| Keywords: | Diblock copolymer Blend Self-assemble Micro-separation Phase behavior |
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