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多元醇及其二元混合物固-固相变的IR研究
引用本文:冯海燕,刘晓地,何书美,武克忠,张建玲.多元醇及其二元混合物固-固相变的IR研究[J].物理化学学报,1999,15(9):850-855.
作者姓名:冯海燕  刘晓地  何书美  武克忠  张建玲
作者单位:Department of Chemistry,Hebei Normal University,Shijiazhuang 050016
基金项目:河北省教委专项科研基金资助项目!(97116)
摘    要:固固相变储能物质多元醇类以其有适宜的转变温度、较高的转变焓、具有经济和技术潜力而受到人们的重视,已在热力学和动力学等方面对其进行广泛和深入的研究1-3],并通过红外光谱法研究了几种纯多元醇固固转变的机理1].本文对几种多元醇及其二元混合物进行变温红外光谱的测定,进一步探讨了变化的规律.1 实 验11 药品:新戊二醇(NPG)为保证试剂(日本东京化成株式工业会社),三羟甲基乙烷(PG)超纯(日本东京化成株式工业会社),季戊四醇(PE)化学纯(北京化学试剂公司).12 仪器美国PE公司M1730型富里叶变换红外光谱仪;日本E012A号H…

关 键 词:多元醇  固-固相变  红外光谱  氢键  
收稿时间:1998-11-20
修稿时间:1999-03-04

Studies on Solid-Solid Phase Transition of Polyols and their Binary Mixtures by Infrared Spectroscopy
Feng Haiyan,Liu Xiaodi,He Shumei,Wu Kezhong,Zhang Jianling.Studies on Solid-Solid Phase Transition of Polyols and their Binary Mixtures by Infrared Spectroscopy[J].Acta Physico-Chimica Sinica,1999,15(9):850-855.
Authors:Feng Haiyan  Liu Xiaodi  He Shumei  Wu Kezhong  Zhang Jianling
Affiliation:Department of Chemistry,Hebei Normal University,Shijiazhuang 050016
Abstract:FT-infrared spectrometer was used to obtain a series of infrared spectra at various temperatures of pentaerythritol(PE)、pentaglycerine(PG)、neopentylglycol(NPG) and their binary mixtures. The shifts of -OH absorption peak reveal the solid-solid phase transition mechanisms and the connection of wave number shifts with temperature and enthalpies of phase transition. The solid-solid phase transitions of the three polyols and their binary mixtures are known to transform from a low symmetric layered crystal structure to a highly symmetric face centered cubic structure. Experimental results support a mechanism which involves reversible breaking of nearest neighbor hydrogen resonance bonds in the molecular crystals at the transformation temperature. Infrared spectra show reversible increase in the wave number of the absorption peak of -OH groups with reversible breaking of the hydrogen bonds. This is in agreement with the experimental results of X-ray diffraction and thermal analysis.
Keywords:Polyols    Solid-solid phase transition    Infrared spectra    Hydrogen bonds
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