Scattering and Gaussian Fluctuation Theory for Semiflexible Polymers
Scattering and Gaussian Fluctuation Theory for Semiflexible Polymers
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DOI：
10.3390/polym8090301
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发表时间：
2016-09
期刊：
影响因子：
5
通讯作者：
Xiangyu Bu;Xinghua Zhang
中科院分区：
文献类型：
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作者：
Xiangyu Bu;Xinghua Zhang
蠕虫状链是半柔性聚合物最好的理论模型之一。结构因子可以通过散射实验获得，表征不同长度尺度下的密度相关性。在本综述中，演示了计算蠕虫链模型静态结构因子的数值方法及其一般性质。特别是，对涉及蠕虫链模型的多尺度性质的链长度和持久长度进行了很好的讨论。利用数值结构因子，可以建立蠕虫链模型的高斯涨落理论，是分析系统结构稳定性和预测系统旋节线的有力工具。以蠕虫状二嵌段共聚物的微相分离为例，演示高斯涨落理论的应用。
The worm-like chain is one of the best theoretical models of the semiflexible polymer. The structure factor, which can be obtained by scattering experiment, characterizes the density correlation in different length scales. In the present review, the numerical method to compute the static structure factor of the worm-like chain model and its general properties are demonstrated. Especially, the chain length and persistence length involved multi-scale nature of the worm-like chain model are well discussed. Using the numerical structure factor, Gaussian fluctuation theory of the worm-like chain model can be developed, which is a powerful tool to analyze the structure stability and to predict the spinodal line of the system. The microphase separation of the worm-like diblock copolymer is considered as an example to demonstrate the usage of Gaussian fluctuation theory.