摘要
用差分扫描热分析仪、偏光显微镜观察了香蕉形液晶在结晶过程中星形、草状两种分形结构的形成规律。采用计盒维数的方法,计算了这两种分形体的分形维数大约为1.9。用计算机模拟,重现了它的结晶过程,分形理论说明这种香蕉形液晶的结晶过程属于渗流生长模型。
Fractal features of aggregates growing out of the isotropic melt of a chiral banana-shaped liquid crystal, 1,3-phenylene bis {4-[ 3-chloro-4-（3,7-dimethyloctyloxyl） ] phenyliminomethyl} benzoate, were investigated with differential scanning calorimetry, polarizing optical microscopy, and computer - aided simulation, respectively. Both star-like and grass-like aggregates were observed to grow out of the isotropic melt of the bent-core liquid crystal. With box-counting method, we calculated the fractal dimensions to be about 1.9 for both the star-like and the grass-like aggregates, suggesting the percolation growth of the banana-phase from the isotropic melt of the chiral banana-shaped liquid crystal.
出处
《南阳理工学院学报》
2009年第3期17-20,共4页
Journal of Nanyang Institute of Technology
基金
河南省基础与前沿基础研究项目(072300410310)
河南省科技攻关项目(0624250022)
河南省青年骨干教师资助计划(2008755009)
南阳市科技发展计划资助项目(2005PT109)资助项目
关键词
香蕉形液晶
分形
分形维数
渗流
Banana-shaped liquid crystal
Fractal
Fractal dimension
Percolation
