丙三醇变温红外光谱研究

Study on infrared spectrum of glycerol in variable temperature

在293~393 K温度范围内,采用变温红外技术(包括变温一维红外光谱和变温二阶导数红外光谱)开展了丙三醇的热稳定研究。研究发现丙三醇主要存在ν_(OH)、ν_(asCH)2、ν_(sCH2)、δ_(CH2)、ν_(asC-O)和ν_(sC-O)6种红外吸收模式,随着测定温度的升高,丙三醇的主要官能团对应的红外吸收强度下降,且相应的红外吸收频率和峰型有明显变化。本项研究显示出变温红外光谱技术在丙三醇稳定性分析中的重大作用。

In the temperature range of 293～ 393 K, the thermal stability of glycerol was studied by variable temperature infrared spectrum（ including variable temperature one-dimensional infrared spectrum and second derivative infrared spectrum）. It is found that there are 6 infrared absorption modes of glycerol include νOH、νasCH2、νsCH2、δCH2、νasC-O and νsC-O.With the increase of temperature, the corresponding infrared absorption intensity of the main functional groups of glycerol decrease, and the corresponding infrared absorption frequency and peak pattern change obviously. This study shows that variable temperature infrared spectrum plays an important role in stability analysis of glycol.