The effect of asymmetry of the coil block on self-assembly in ABC coil-rod-coil triblock copolymers
The effect of asymmetry of the coil block on self-assembly in ABC coil-rod-coil triblock copolymers
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线圈嵌段不对称性对ABC线圈-棒-线圈三嵌段共聚物自组装的影响
DOI：
10.5488/cmp.20.43601
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发表时间：
2017-12
影响因子：
0.6
通讯作者：
欧阳顺利
中科院分区：
文献类型：
--
作者：
韩向刚;孟海红;马永红;欧阳顺利
利用自洽场方法，重点研究了ABC线圈-棒-线圈三嵌段共聚物中线圈块的不对称性对微相分离的影响。对于不同组分的棒块，观察到了一些稳定的结构，即片状、圆柱状、回旋体和核壳六角晶格，并绘制了相图。计算结果表明，线圈阻塞分数$f_{\TEXT A}$的影响与$f_{\TEXT B}$有关。当$f_{\Text B}=0.2$时，线圈嵌段的非对称性效应与ABC柔性三嵌段共聚物相似，当$f_{\Text B}=0.4$时，ABC线圈-棒-线圈三嵌段共聚物在一定条件下的自组装行为类似于棒-线圈两嵌段共聚物。当$f_{\Text B}$继续增加时，线圈块的不对称性的影响减小。对于$f{\Text B}=0.4$，在对称和较不对称的条件下，不同组元之间相互作用参数的增加会导致柱面和片层之间不同的转变。结果表明，链结构对自组装有显著的影响，可以为共聚材料的设计和合成提供指导。
Using the self-consistent field approach, the effect of asymmetry of the coil block on the microphase separation is focused in ABC coil-rod-coil triblock copolymers. For different fractions of the rod block $f_{\text B}$, some stable structures are observed, i.e., lamellae, cylinders, gyroid, and core-shell hexagonal lattice, and the phase diagrams are constructed. The calculated results show that the effect of the coil block fraction $f_{\text A}$ is dependent on $f_{\text B}$. When $f_{\text B}=0.2$, the effect of asymmetry of the coil block is similar to that of the ABC flexible triblock copolymers; When $f_{\text B}=0.4$, the self-assembly of ABC coil-rod-coil triblock copolymers behaves like rod-coil diblock copolymers under some condition. When $f_{\text B}$ continues to increase, the effect of asymmetry of the coil block reduces. For $f_{\text B}=0.4$, under the symmetrical and rather asymmetrical conditions, an increase in the interaction parameter between different components leads to different transitions between cylinders and lamellae. The results indicate some remarkable effect of the chain architecture on self-assembly, and can provide the guidance for the design and synthesis of copolymer materials.
影响因子：
3.2
作者：
S. Lecommandoux;R. Borsali
通讯作者：
S. Lecommandoux;R. Borsali
DOI：
10.1002/0470093943
发表时间：
2004-01
期刊：
--
影响因子：
--
作者：
I. Hamley
通讯作者：
I. Hamley
圆柱形纳米孔限制下线性三嵌段共聚物的自组装
影响因子：
4.3
作者：
Qiu, Wen-juan;Li, Shi-ben;Ji, Yong-yun;Zhang, Lin Xi
通讯作者：
Zhang, Lin Xi