共聚物红外光谱的小波变换  

Wavelet Transform of Infrared Spectra of Poly (Acrylamide -Sodium Acrylate)Hydrogel Copolymers

作　　者：陈洁[1] 单军[2] 张懋森[1] 

机构地区：[1]中国科学技术大学化学物理系,合肥230026 [2]合肥工业大学化工学院,合肥230009

出　　处：《分析化学》1997年第2期172-174,共3页Chinese Journal of Analytical Chemistry

基　　金：国家自然科学基金

摘　　要：用傅里叶变换红外光谱研究了辐射合成的丙烯酰胺、丙烯酸钠均聚物水凝胶和几种丙烯酰胺／丙烯酸钠配比不同的共聚物水凝胶的组成变化，发现共聚物的特征吸收带重叠得比较严重，尤其当丙烯酸钠单元含量较低时，其特征吸收带大部分则不能分辨。将其红外光谱经小波变换后，这类共聚物的特征吸收带较好地得到分离，成功地提高了红外光谱图的分辨率，有助于更好地定性或定量表征共聚物的组成。The signals of Fourier transform infrared spectra of poly(acrylamide-sodium acry- late) [P(AM-NaA)]hydrogel copolymers in different AM/NaA monomer molar ratios were treated with a wavelet transform technique. Results show that the peak shape of the charac- teristic absorption in IR spectra of these copolymers after wavelet transform becomes sharper and the spectral resolution is enhanced. It is more Successful when the amount of NaA monomer unit in P(AM-NaA) copolymer is far lower than that of AM monomer unit. The wavelet transform is helpful to characterize the composition of copolymer qualitatively and quantitatively.

关 键 词：小波变换 红外光谱 共聚物 

分 类 号：O631.24[理学—高分子化学]