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高聚物的结构分析,一般说来使用化学分析法比较复杂或不能分析。红外吸收光谱是解决这类分析的重要手段之一。红外光谱根据它的基团特征频率可以定性鉴定化合物中的基团,与整个标准光谱相比较可以判断是何种结构的化合物或高聚物。同小分子红外光谱一样,利用比尔(Beer)定律可以定量测定高聚物的主要结构或主要组成的含量。当然,在进行红外光谱分析时,有时需要进行一定的化学处理或对比,有时还要同化学分析、各种色谱,核磁共振波谱及质谱等其他手段结合起来才能有效地解决问题。定量分析是根据所选定的特征吸收谱带的强度,按照比尔定律进行:
Structural analysis of polymers, in general, the use of chemical analysis is more complex or can not be analyzed. Infrared absorption spectroscopy is one of the important means to solve this kind of analysis. Infrared spectroscopy can be based on its group characteristic frequency of qualitative identification of compounds in the group, compared with the entire standard spectrum can determine what kind of structure of compounds or polymers. Like small-molecule infrared spectroscopy, the Beer’s law can be used to quantitatively determine the major structure or major component content of a polymer. Of course, some chemical treatments or comparisons are sometimes required when performing infrared spectroscopy, sometimes in combination with other methods such as chemical analysis, various chromatograms, nuclear magnetic resonance spectroscopy and mass spectrometry in order to effectively solve the problem. Quantitative analysis is based on the selected characteristics of the absorption band intensity, according to Bill’s law: