PAM、PNaA和P(AM-NaA)水凝胶微观形态的分形研究  

STUDIES ON FRACTAL CHARACTERISTICS OF MICROMORPHOLOGY OF PAM, PNaA AND P(AMNaA) HYDROGEL POLYMERS

作　　者：陈洁[1] 单军[1] 刘占军 张懋森[2] 

机构地区：[1]合肥工业大学化工学院高分子材料专业 [2]中国科技大学化学物理系

出　　处：《高分子材料科学与工程》1997年第S1期48-51,共4页Polymer Materials Science & Engineering

摘　　要：用辐射聚合方法合成的丙烯酰胺、丙烯酸钠的均聚物及其共聚物水凝胶，借助于扫描电子显微镜技术观察了组成不同的干态水凝胶聚合物的微观形态特征，探讨了不均匀的微观交联网络的分形特性，用分形维数对水凝胶聚合物的微观网络的致密程度进行了量化表征。结果表明，分形维数能够从整体上定量地表征水凝胶聚合物的不均匀微观网络之间随组成改变而产生的细微差异，而且，样品的微观网络愈致密则其分形维数值愈大。n this paper, PAM and PNaA homopolymer hydrogels and P(AMNaA) copolymer hydrogels with different monomer molar ratios AM/NaA were synthesized by 60Coγ ray radiation polymerization in aqueous solutions. The micromorphology of these dry hydrogel samples was observed by scanning electron microscope (SEM) and shows nonhomogeneous distribution of microscopic network structure. The fractal characteristics of micromorphology of the samples were investigated. The results show that the fractal dimension values can quantitatively characterise the micro differences in the microscopic network distribution of samples, and the variation of these fractal dimension values demonstrates the change in density of microscopic network distribution of samples.

关 键 词：水凝胶 微观形态 分形 

分 类 号：O631[理学—高分子化学]