Physical Aging of Maltose Glasses as Measured by Standard and Modulated Differential Scanning Calorimetry

被引：0
作者：
A. M. Lammert
R. M. Lammert
S. J. Schmidt
机构：
[1] Hunt-Wesson,
[2] Inc.,undefined
[3] Ortel Corporation,undefined
[4] Department of Food Science and Human Nutrition,undefined
来源：
Journal of Thermal Analysis and Calorimetry | 1999年 / 55卷
关键词：
modulated DSC; physical aging; standard DSC;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The physical aging characteristics of maltose glasses aged at two temperatures below the glass transition temperature, Tg, (Tg-10°C and Tg-20°C) from 5 to 10 000 min were measured by standard differential scanning calorimetry (SDSC) and modulated differential scanning calorimetry (MDSC). The experimentally measured instrumental Tg, the calculated Tg, and the excess enthalpy values were obtained for aged glasses using both DSC methods. The development of excess enthalpy as a function of aging time, as measured by both SDSC and MDSC, was fit using the Cowie and Ferguson and Tool-Narayanswamy-Moynihan models. The change in the Tg values and the development of the excess enthalpy resulting from physical aging measured by the two DSC methods are discussed.
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页码：949 / 975
页数：26
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