表面增强拉曼光谱研究高分子共混物薄膜相结构

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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1 604, 1 585 cm^-1处苯环的伸缩振动峰和PMMA在1 728 cm^-1处羰基的伸缩振动峰，可以确定薄膜(厚度约为800 nm)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400 nm)的Raman光谱，并且成功地对其组成进行了分析。

关键词：PS/PMMA;薄膜;相结构;表面增强拉曼散射

Abstract：Polystyrene/poly (methyl methacrylate) (PS/PMMA) was studied after the thin films were prepared on glass substrate by spin-coating from THF.Raman 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 1 604 and 1 585 cm^-1 due to stretching of benzene rings, and 1 728 cm^-1 due to stretching of CO 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 thin films was also discussed.

Key words：PS/PMMA;Film;Phase structure;SERS

收稿日期: 2004-03-01 修订日期: 2004-07-16

中图分类号:

O657.3

通讯作者: 谢续明

引用本文:

宗骐¹，谢续明^1*，陈凤恩²，郁鉴源² . 表面增强拉曼光谱研究高分子共混物薄膜相结构[J]. 光谱学与光谱分析, 2005, 25(07): 1064-1067.
ZONG Qi¹, XIE Yu-ming^1*, CHEN Feng-en², YU Jian-yuan² . Investigation of Phase Morphology of PS／PMMA Blend Thin Film by Surface Enhanced Raman Scattering . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2005, 25(07): 1064-1067.

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https://www.gpxygpfx.com/CN/Y2005/V25/I07/1064