贮热材料新戊二醇季戊四醇二元体系相图的构筑

吉林大学学报(工学版)

贮热材料新戊二醇季戊四醇
二元体系相图的构筑

武克忠^1，2，李建玲²，刘晓地¹,张建军¹

1河北师范大学化学与材料科学学院,石家庄 050016;2北京科技大学理化系,北京 100083

收稿日期:2007-01-08 修回日期:1900-01-01 出版日期:2008-03-01 发布日期:2008-03-01
通讯作者: 武克忠

Phase diagram of binary system NPGPE for heat storage material

Wu Ke-zhong^1,2,Li Jian-ling²,Liu Xiao-di¹，Zhang Jian-jun¹

1.Department of Chemistry and Material Science,Hebei Normal University,Shijiazhuang 050016,China;
2.Department of Physical Chemistry,University of Science and Technology Beijing,Beijing 100083,China

Received:2007-01-08 Revised:1900-01-01 Online:2008-03-01 Published:2008-03-01
Contact: Wu Ke-zhong

摘要/Abstract

摘要： 为了选择适宜的贮热材料，对两种多元醇新戊二醇和季戊四醇利用差示扫描量热(DSC)、X射线衍射和变温红外光谱技术构筑二元体系相图。结果表明：在一定的组成范围内相图中存在两个低共析温度和一个转晶温度，分别为39 ℃、163 ℃和172 ℃。由于多元醇分子中存在OH，因而多元醇分子间能形成氢键。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。变温红外光谱测得的OH特征吸收峰位移发生突跃的温度区间恰好与体系各自DSC测得的相转变温度相吻合。多元醇的晶体结构、分子的大小是影响二元体系不同相态间互溶度的重要因素。

关键词: 化学物理学, 新戊二醇, 季戊四醇, 相图, DSC

Abstract: The phase diagram of the binary system,neopentyl glycolpentaerythritol (NPGPE),was established by three techniques:differential scanning calorimetric (DSC) method,Xray diffraction and infrared (IR) spectra at various temperatures.Results show that,in a certain composition range,the phase diagram is characterized by two eutectoid invariants,39 ℃ and 163 ℃,and a crystal transformation temperature,172 ℃.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.The temperatures of solidsolid phase transition for polyalcohols measured by DSC are consistent with that by IR spectra,which can reveal the mechanism of solidsolid phase transition for polyalcohols.The miscibility of this system is discussed on the basis of intermolecular interaction in ordered lowtemperature phase and orientationally disordered hightemperature phase.

Key words: chemical physics, neopentyl glycol, pentaerythritol, phase diagram, DSC

中图分类号:

O642.4

武克忠，李建玲，刘晓地,张建军 . 贮热材料新戊二醇季戊四醇
二元体系相图的构筑[J]. 吉林大学学报(工学版), 2008, 38(02): 314-0318.

Wu Ke-zhong,Li Jian-ling,Liu Xiao-di，Zhang Jian-jun . Phase diagram of binary system NPGPE for heat storage material[J]. 吉林大学学报(工学版), 2008, 38(02): 314-0318.

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