PMMA/PS共混物薄膜中Voronoi结构的形成  

FORMATION OF VORONOI PATTERN IN PMMA/PS BLEND THIN FILMS

作　　者：宗骐[1] 谢续明[1] 

机构地区：[1]教育部先进材料重点实验室清华大学化工系高分子研究所,北京100084

出　　处：《高分子学报》2005年第4期617-620,共4页Acta Polymerica Sinica

基　　金：国家自然科学基金(基金号20174022);重大研究计划"理论物理学及其交叉科学若干前沿问题"子课号90103035);重点基金(基金号10334020)资助项目

摘　　要：Thin films of poly(methyl methacrylate)/polystyrene (PMMA/PS 80/20 W/W) blend prepared on glass substrate by spin-coating from a cosolvent, chloroform were studied. The formation of regular Voronoi patterns was found under phase contrast microscopy (PCM). It was observed that there were clear concave boundaries in the PCM images by atomic force microscopy (AFM). Although the sample was annealed at 220℃ more than 7 h, no changes of the Voronoi pattern occurred, implying that the phase separation structure in the Voronoi pattern was almost complete during spin-coating process. It was believed that the formation of this pattern was due to the convection during spin-coating procedure.Thin films of poly（methyl methacrylate）/polystyrene （PMMA/PS 80/20 W/W） blend prepared on glass substrate by spin-coating from a cosolvent, chloroform were studied. The formation of regular Voronoi patterns was found under phase contrast microscopy （PCM）. It was observed that there were clear concave boundaries in the PCM images by atomic force microscopy （AFM）. Although the sample was annealed at 220℃ more than 7h, no changes of the Voronoi pattern occurred, implying that the phase separation structure in the Voronoi pattern was almost complete during spin-coating process. It was believed that the formation of this pattern was due to the convection during spin-coating procedure.

关 键 词：高分子共混物 Voronoi结构 对流 旋转涂膜 自然结构 VORONOI 共混物薄膜 PMMA PS 17世纪 

分 类 号：TQ320.721[化学工程—合成树脂塑料工业]