多元醇固-固相变变温红外光谱研究

STUDY ON INFRARED SPECTRUM AT VARIOUS TEMPERATURE WITH SOLID-SOLID PHASE CHANG OF THE POLYOLS

利用富里叶变温红外光谱，对多元醇及其二元体系在发生固固相变时，多元醇晶体中－ Ｏ Ｈ 伸缩振动吸收峰位置随温度变化进行了讨论。实验表明，－ Ｏ Ｈ 吸收峰位置变化，既能反映多元醇发生相变的温度区间，又与转变热相对应。波数变化越大，转变热越高。变温红外光谱中－ Ｏ Ｈ 伸缩振动吸收峰的变化揭示了多元醇固固相变的机理。

During the solid solid phase chang of the polyols and binary mixtures of polyhydric alcohols,-OH in the crystals of the polyols stretching vibration absorption center shifts with temperatures.In this paper the shift is experimentally studied with a with Fourier infrared spectra at various temperatures.The experiment shows that the change of -OH absorption center is coincident with the temperatures range of the polyols transformation as well as,corresponding to the chang of latent heat,the more wave numbers shifts,the more latent heat changes.In infrared spectrum at various temperatures,the change of -OH stretching vibration absorption center shows the mechanism of solid solid phase chang of the polyols. $$$$