Disorder to Order Transition and Ordered Morphology of Coil-Comb Block Copolymer by Self-Consistent Field Theory.
Disorder to Order Transition and Ordered Morphology of Coil-Comb Block Copolymer by Self-Consistent Field Theory.
复制标题
利用自洽场论研究线圈梳状嵌段共聚物的无序有序转变和有序形貌
DOI：
10.1186/s11671-015-1035-8
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发表时间：
2015-12
影响因子：
--
通讯作者：
Wang R
中科院分区：
文献类型：
--
作者：
Jiang Z;Qian Z;Yang H;Wang R
用自洽场理论研究了螺旋梳状共聚物A-b-（Bm+ 1-g-Cm）的无序到有序的转变以及无序态附近的有序结构.通过改变侧链数m = 1，2，3的共聚物的组成，得到了螺旋梳状共聚物的相图。与梳形共聚物或线性嵌段共聚物相比，无序到有序的转变要复杂得多。随着侧链数目m的增加，无序-有序转变的Flory-Huggins相互作用参数（DOT）增加，当嵌段A、B和C的体积分数近似相等时，DOT最低。当一种组分占少数时，无序-有序转变曲线与二元共聚物相似，但曲线表现出不对称性。侧链越长、越短的梳形共聚物越稳定。讨论了从无序态到有序态的变化。这一结果有助于设计螺旋梳状共聚物，获得有序的形貌。
The disorder to order transition and the ordered patterns near the disordered state of coil-comb copolymer A-b-(Bm+ 1-g-Cm) are investigated by the self-consistent field theory. The phase diagrams of coil-comb copolymer are obtained by varying the composition of the copolymer with the side chain numberm= 1, 2, and 3. The disorder to order transition is far more complex compared with the comb copolymer or linear block copolymer. As the side chain numbermincreases, the Flory-Huggins interaction parameter of disorder to order transition (DOT) increases and the lowest DOT occurs when the volume fractions of blocks A, B, and C are approximately equal. When one component is the minority, the disorder to order transition curve is similar with binary copolymer, but the curve shows the asymmetric property. The comb copolymer is more stable with larger side chain numbermand shorter side chain. The ordered patterns from the disordered state are discussed. The results are helpful for designing coil-comb copolymers and obtaining the ordered morphology.