物理学报2011，Vol.60Issue(3)：130-133,4.
多元醇固-固相变机理的研究
Mechanism of polyalcohol solid-solid phase change
摘要
Abstract
Many polyalcohols will change from one crystal structure to another at certain temperatures. A lot of works had reported their phase change enthalpy, phase change temperature and phase diagram. It is taken that their phase change enthalpy must be related to their hydrogen bond. This article investigated quantitatively the relation between phase change enthalpy and hydrogen bond of NPG ( neopentylglycol), PG (pentaglycerino) and PE (pentaerythritol) on the basis of infrared spectrum experimental data and calorimetric results. It was shown that before phase change, all the -OH are associated and as a result NPG, PC and PE form layer structure. After phase change, NPG, PG and PE move along the layer and as a result some hadrogen bonds break. Therefore the phase change enthalpy equals the energy used to break hydrogen plus the energy used to increase the vibration frequency of other still associated -OH.关键词
固一固相变/相变焓/氢键/红外光谱Key words
solid-solid phase change/ phase change enthalpy/ hydrogen bond/ infrared spectrum引用本文复制引用
王小伍,徐海红..多元醇固-固相变机理的研究[J].物理学报,2011,60(3):130-133,4.基金项目
华南理工大学中央高校基本科研业务费专项资金(批准号:X2LXD2104550)资助的课题. （批准号:X2LXD2104550）
