PMMA/超支化聚(酯-酰胺)共混物薄膜中柱状相结构的形成  

FORMATION OF CYLINDER LIKE PHASE STRUCTURE IN PMMA/HYPERBRANCHED POLY(ESTER-AMIDE) BLEND THIN FILMS

作　　者：李尧[1] 宗骐[1] 唐黎明[1] 谢续明[1] 

机构地区：[1]清华大学化工系材料学院先进材料学教育部重点实验室,北京100084

出　　处：《高分子学报》2005年第2期254-257,共4页Acta Polymerica Sinica

基　　金：国家自然科学基金 (基金号 2 0 1740 2 2 );重大研究计划"理论物理学及其交叉科学若干前沿问题"子课题 (项目号 90 10 3 0 3 5 );重点基金 (基金号 10 3 3 40 2 0 )资助

摘　　要：利用相差显微镜、三维形貌测量仪对聚甲基丙烯酸甲酯 超支化聚 (酯 酰胺 ) (PMMA HBP)共混物薄膜在玻璃基板作用下的相分离行为进行了研究 .结果表明 ,不同组分比的共混物薄膜会呈现不同的相形态和相分离过程 .当薄膜厚度在 5 0 0nm左右 ,HBP为低组分时 ,发现了一种特殊的分散相为圆柱状的相形态 ,并对该相形态出现的条件进行了研究 .认为基板与组分之间的相互作用和薄膜厚度决定了圆柱状结构形成 .Using phase contrast microscope, the evolution of the phase separation was investigated for poly( methyl methacrylate) (PMMA)/hyperbranched poly (ester-amide) (HBP) blend thin films on glass substrates. The films with different component ratios show different phase morphologies and phase separation processes. At a film thickness of about 500 nm, a cylinder-like dispersed phase was observed in the films with low HBP content. The conditions for the special morphology occurring were also studied. The interaction between the substrate and HBP and the thickness of blend films are essential factors for the formation of the phase morphology. It was also found that the appearance of the special cylinder-like morphology depends on the component ratio and the film thickness. Only the film thickness was between the upper critical film thickness and the lower critical film thickness can the special structure be observed. There was a transition in the critical thickness as the HBP weight percent varied.

关 键 词：共混物薄膜 超支化 PMMA 酰胺 相结构 聚甲基丙烯酸甲酯 薄膜厚度 相差显微镜 相分离行为 相形态 玻璃基板 三维形貌 分离过程 结构形成 相互作用 圆柱状 测量仪 分散相 组分 

分 类 号：TQ320.721[化学工程—合成树脂塑料工业]