表面增强拉曼光谱研究高分子共混物薄膜相结构  

Investigation of Phase Morphology of PS/PMMA Blend Thin Film by Surface Enhanced Raman Scattering

作　　者：宗骐[1] 谢续明[1] 陈凤恩[2] 郁鉴源[2] 

机构地区：[1]清华大学化工系高分子研究所,材料院先进材料教育部重点实验室,北京100084 [2]清华大学化学系,北京100084

出　　处：《光谱学与光谱分析》2005年第7期1064-1067,共4页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金(20174022);重大研究计划(90103035);重点基金(10334020)资助项目

摘　　要：采用拉曼光谱法研究了由聚苯乙烯(PS)/聚甲基丙烯酸甲酯(PMMA)的四氢呋喃(THF)溶液在玻璃基板上旋转涂膜得到的共混物薄膜。应用显微共焦拉曼光谱,根据PS在1604,1585cm-1处苯环的伸缩振动峰和PMMA在1728cm-1处羰基的伸缩振动峰,可以确定薄膜(厚度约为800nm)表面海岛状相结构的组分分布信息。另外,还对210℃下PS/PMMA(30/70)共混物薄膜退火过程中表面的变化进行了分析。采用表面增强拉曼散射效应对高聚物的增强作用得到了薄膜(厚度约为400nm)的Raman光谱,并且成功地对其组成进行了分析。Polystyrene/poly （methyl methacrylate） （PS/PMMA） was studied after the thin films were prepared on glass substrate by spin-coating from THF. Rarnan spectroscopy combined with microscopy was used to obtain information on the morphology and structure of the thin films. From the relative intensities of the peaks around 1604 and 1585cm^-1 due to stretching of benzene rings, and 1728cm^-1 due to stretching of C=O for PS and PMMA respectively, the authors could define the composition of the domains in the sea-island-like phase-separated structure in the microscopic image. Furthermore, the structure evolution was followed by Raman spectroscopy during the in-situ annealing of PS/PMMA （30/70） blend thin films at 210℃. And the effect of SERS on the PS thinfilms was also discussed.

关 键 词：PS/PMMA 薄膜 相结构 表面增强拉曼散射 

分 类 号：O657.3[理学—分析化学]