| 光谱学与光谱分析 |
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| Characteristics of Raman Spectra of Polyethylene Terephthalate |
| TONG Na1, ZHU Chang-jun1*, SONG Li-xun1, ZHANG Chong-hui1, ZHANG Guo-qing1, ZHANG Yi-xin2 |
1. Department of Physics, School of Science, Xi’an Polytechnic University, Xi’an 710048, China
2. School of Textile and Materials, Xi’an Polytechnic University, Xi’an 710048, China |
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Abstract Raman spectrometry was employed to study the characteristics of Raman spectra of polyethylene terephthalate (PET), which were treated with sodium hydroxide, sulfuric acid and copper sulfate, respectively. Raman spectra under different conditions were obtained and the characteristics of the Raman spectra were analyzed. The morphology structures were observed under different conditions using Atomic Force Microscope. The results show that the spectral intensity of PET treated with sodium hydroxide is higher than that untreated between 200～1 750 cm-1, while the intensity of PET treated with sodium hydroxide is lower than that untreated beyond 1 750 cm-1 and the fluorescence background of Raman spectra is decreased. The spectral intensity of PET treated with sulfuric acid is remarkably reduced than that untreated, and the intensity of PET treated with copper sulphate is much higher than that untreated. The research results obtained by Atomic Force Microscopy show that the variations of the Raman spectra of PET fibers are closely related to the chemical bonds and molecular structures of PET fibers. The surface of the PET treated with sodium hydroxide is rougher than that untreated, the surface roughness of the PET treated with sulfuric acid is reduced as compared to that untreated, while the surface roughness of the PET treated with copper sulphate is increased. The results obtained by Raman spectroscopy are consistent with those by Atomic Force Microscopy, indicating that the combination of Raman spectroscopy and Atomic Force Microscopy is expected to be a promising characterization technology for polymer characteristics.
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Received: 2015-01-20
Accepted: 2015-04-16
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Corresponding Authors:
ZHU Chang-jun
E-mail: cjzhu@xpu.edu.cn
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