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采用拉曼光谱法研究聚对苯二甲酸乙二酯(polyethylene terephthalate,PET)分子拉曼振动模式,分析比较PET纤维分别进行硫酸、氢氧化钠和硫酸铜处理前后的拉曼光谱特性.结果表明,经Na OH处理的PET纤维,在200—1 750 cm-1内拉曼峰强度高于未经处理的PET纤维,荧光背景明显减弱;经H2SO4处理的PET纤维,拉曼峰强度显著低于未经处理的PET纤维;经Cu SO4处理的PET纤维,拉曼峰强度高于未经处理的PET纤维.采用原子力显微镜对处理前后PET纤维形貌结构进行观察,测量结果与拉曼光谱结果一致,表明拉曼光谱与原子力显微镜的结合可以成为高聚物物性的表征技术.
The Raman spectra of polyethylene terephthalate (PET) molecules were investigated by Raman spectroscopy. The Raman spectra of PET fibers before and after treatment with sulfuric acid, sodium hydroxide and copper sulfate were analyzed. , The Raman intensity of Na-treated PET fibers in 200-1 750 cm-1 was higher than that of untreated PET fibers, and the fluorescence background was obviously weakened. The Raman intensity of PET fibers treated with H2SO4 was significantly lower than that of untreated PET fibers Untreated PET fibers, Raman intensity of PET fibers treated with CuSO4 was higher than that of untreated PET fibers.The morphology of PET fibers before and after treatment was observed by atomic force microscope, and the results were consistent with the results of Raman spectroscopy , Indicating that the combination of Raman spectroscopy and atomic force microscopy can be a characterization technique for high polymer properties.