物理化学学报2012，Vol.28Issue(9)：2023-2028,6.DOI:10.3866/PKU.WHXB201206061
三乙酸甘油酯玻璃化转变的焓弛豫与介电弛豫研究
Enthalpy and Dielectric Relaxations of Triacetin in the Vicinity of Glass Transition
摘要
Abstract
To understand the experimental observation that the dynamic parameters determined for enthalpy and dielectric relaxation might differ in fragile glass-forming molecular liquids, a fragile molecular liquid, triacetin, was chosen for the study of the two relaxation dynamics. The non-Arrhenius and non-exponential characters were focused, and the kinetic fragility and non-exponential parameter determined from the two relaxation measurements were found to be remarkably similar. Experimental results indicate that the degree of correlation in the molecular motions involved in the two relaxations depends on molecular flexibility. The dependence of the dynamic parameters on molecular structures in the glass forming liquids is discussed.关键词
玻璃化转变/过冷液体/结构弛豫/焓弛豫/介电弛豫Key words
Glass transition/ Supercooled liquid/ Structural relaxation/ Enthalpy relaxation/Dielectric relaxation分类
化学化工引用本文复制引用
陈泽明,毕东阳,王利民..三乙酸甘油酯玻璃化转变的焓弛豫与介电弛豫研究[J].物理化学学报,2012,28(9):2023-2028,6.基金项目
国家自然科学基金(51071138),河北省自然科学基金(A2010002048)和燕山大学优秀博士生科学基金(YSUSF201102)资助项目 （51071138）
