Acta Phys. -Chim. Sin. ›› 2005, Vol. 21 ›› Issue (08): 909-914.doi: 10.3866/PKU.WHXB20050817

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Phenomenological Study of Structure Relaxation of Glycerol Aqueous Glass

GAO Cai; ZHOU Guo-yan   

  1. Department of Energy & Environment Engineering, Zhongyuan Institute of Technology, Zhengzhou 450007;
  • Received:2004-12-27 Revised:2005-03-14 Published:2005-08-15
  • Contact: GAO Cai E-mail:gao_cai@hotmail.com

Abstract: In order to examine the effects of water contents on structure relaxation parameters of glycerol aqueous glasses, heat capacity and glass transition temperature of five aqueous solutions (60%, 70%, 80%, 90%, and 100%) were determined using the differential scanning calorimetry (DSC). Structure relaxation behaviors of glycerol aqueous glasses were investigated in the term of Tool-Narayanaswamy-Monihan (TNM) model parameters. The structure relaxation time was found to decrease as the water content increased. Curve-fitting results indicated that the apparent activation energy and non-exponential parameter decreased while non-linear parameter and pre-exponential parameter increased as the water content increased.

Key words: Structure relaxation, Glycerol, Aqueous solutions, Differential scanning calorimetry (DSC)