Melts of semiflexible diblock copolymer
Melts of semiflexible diblock copolymer
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DOI：
10.1063/1.471481
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发表时间：
1996-05
影响因子：
4.4
通讯作者：
M. Matsen
中科院分区：
文献类型：
--
作者：
M. Matsen
用蠕虫链模型和自洽场理论研究了半柔性AB型两嵌段共聚物的熔体。这里考虑的二嵌段在组成上和A-和B-嵌段柔性上是对称的。在这些条件下，形成的显微组织是层状的。我们发现，随着分子刚性的增加，有序-无序转变从高斯链的χN=10.495移动到刚性杆的χN=6.135。在有序状态下，刚性对描述畴间距和界面宽度随分子量的缩放的指数几乎没有影响。然而，比例常数受到显著影响。在有序的微观结构中的段的空间和取向分布检查的选择的条件。
Melts of semiflexible AB diblock copolymers are studied using the wormlike chain model and self‐consistent‐field theory. The diblocks considered here are symmetric in composition and in A‐ and B‐block flexibility. Under these conditions, the microstructure formed is lamellar. We find that an increase in molecular rigidity moves the order–disorder transition from χN=10.495 for Gaussian chains to χN=6.135 for rigid rods. In the ordered state, rigidity has little effect on the exponents that describe the scaling of the domain spacing and of the interfacial width with molecular weight. However, the proportionality constants are significantly affected. The spatial and orientational distribution of segments in the ordered microstructure is examined for a selection of conditions.