高磺化度聚苯胺体系中的分形结构研究

通过透射电镜的观察研究发现磺化聚苯胺的胶体聚集体和胶粒内部结构都具有分形体的特征 ,从而将分形的概念及其数学模型引入共轭导电聚合物体系之中 .磺化聚苯胺胶体的聚集体为很不均匀的分支状开放结构 ,其形成过程可用扩散控制集团聚集模型 (DLCA)进行模拟 ,计算机模拟生成的图形及其分形维数都与实验观测结果相当吻合 .胶粒由于是在分散介质所形成的平均化场中生成 ,屏蔽效应减弱 ,是比由它组成的聚集体要致密的球形结构 ,该结构的生成可用随机雨点模型模拟且结果相近 .

THE STUDY OF FRACTAL STRUCTURE IN HIGHLY SULFONATED POLYANILINE

By using the method of transmission electron microscope (TEM) the fractal structures were found in the colloid aggregates and colloidal particles of the highly sulfonated polyaniline,which is an important processable conductive polymer.In the present paper the concept and the mathematical model of fractal have been introduced into the studies of conjugated polymers.The colloid aggregates appear as an open dendritic structure and its growing process can be analoged by the diffusion limited cluster aggregate (DLCA) model. The analog pattern by computer and the theoretic fractal dimension are consistent with the experimental results.Since the colloidal particle is generated in the flatterning field of the dispersion media,the screening effect is weakened,and the colloidal particle is a spheroidal structure,which is denser than the colloid aggregates.The random rain(RR) model can be applied here and the analog gragh is in agreement with the TEM image.