Numerical simulation of substrate effects on spinodal decomposition in polymer binary mixture: morphology and dynamics
Numerical simulation of substrate effects on spinodal decomposition in polymer binary mixture: morphology and dynamics
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DOI：
10.1016/j.polymer.2005.05.115
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发表时间：
2005-08
期刊：
影响因子：
4.6
通讯作者：
Li-Tang Yan;Xu-Ming Xie
中科院分区：
文献类型：
--
作者：
Li-Tang Yan;Xu-Ming Xie
利用数值模拟研究了三维基底定向旋节线分解（SDSD）二元混合物的形态和动力学特征。模拟结果表明，基底界面上润湿层的形成遵循幂律生长。研究发现，基材润湿引起的各向异性扩散行为的连续影响导致润湿成分随机扩散到基材界面上。由于基材的润湿，基材附近的相形态和平均尺寸波动很大。分别通过相关的尺度律函数讨论了平行和垂直于基底界面的截面的自相似演化。并且还研究了平行和垂直方向的生长机制。
The characteristic features of the morphology and dynamics of binary mixture for substrate-directed spinodal decomposition (SDSD) in three dimensions have been studied using numerical simulations. The simulation results show that the formation of the wetting layer on the substrate interface follows the power-law growth. It is found that the continuous influence of anisotropic diffusive behavior arose by wetting of substrate induces the wetting component spreading onto the interface of the substrate randomly. The phase morphology and averaged size in the vicinity of the substrate fluctuate greatly due to the wetting of the substrate. The self-similar evolution of the cross-sections parallel and perpendicular to the substrate interface is discussed by relevant scale law functions, respectively. And the mechanisms of the growth in both the parallel and perpendicular directions are also investigated.