In the range of temperature closely corresponding to solid-solid transition, the-OH stretching absorption in IR spectra of two polyalcohols and their binary system shift to higher wavenumber.

• 随着温度的升高，多元醇发生固-固相变，分子间存在的氢键逐渐受到破坏，-OH伸缩振动的特征吸收波数向高波数发生突跃。