| 丙三醇水溶液玻璃结构松弛现象学研究 |
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| 引用本文： | 高才,周国燕.丙三醇水溶液玻璃结构松弛现象学研究[J].物理化学学报,2005,21(8):909-914. |
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| 作者姓名： | 高才 周国燕 |
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| 作者单位： | Department of Energy & Environment Engineering, Zhongyuan Institute of Technology, Zhengzhou 450007; |
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| 基金项目： | 河南省重点学科基金，中原工学院青年学术骨干启动资金，国家自然科学基金(50206013)资助项目~~ |
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| 摘 要： | 为了考察水含量对丙三醇水溶液玻璃体结构松弛行为的影响，利用差示扫描量热法(DSC)测量了五种高浓度丙三醇水溶液的玻璃化转变温度和玻璃化转变区域的比热容，利用TNM模型进行了结构松弛的现象学分析. 松弛时间的分析结果表明，水溶液玻璃中水含量越高，则松弛过程越快. TNM模型的计算结果表明，随着水含量的增加，玻璃体系的结构松弛活化能和非指数参数都有逐渐降低的趋势，而非线性参数和指前因子逐渐增加.
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| 关 键 词： | 结构松弛 丙三醇 水溶液 差示扫描量热法 |
| 收稿时间： | 2004-12-27 |
| 修稿时间： | 2005-03-14 |
Phenomenological Study of Structure Relaxation of Glycerol Aqueous Glass |
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| GAO Cai,ZHOU Guo-Yan.Phenomenological Study of Structure Relaxation of Glycerol Aqueous Glass[J].Acta Physico-Chimica Sinica,2005,21(8):909-914. |
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| Authors: | GAO Cai ZHOU Guo-Yan |
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| Institution: | Department of Energy & Environment Engineering, Zhongyuan Institute of Technology, Zhengzhou 450007; |
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| Abstract: | In order to examine the effects of water contents on structure relaxation parameters of glycerol aqueousglasses, 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 aque-ous glasses were investigated in the term of Tool-Narayanaswamy-Monihan (TNM) model parameters. The structurerelaxation time was found to decrease as the water content increased. Curve-fitting results indicated that the apparentactivation energy and non-exponential parameter decreased while non-linear parameter and pre-exponential pa-rameter increased as the water content increased. |
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| Keywords: | Structure relaxation Glycerol Aqueous solutions Differential scanning calorimetry (DSC) |
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