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首页> 外文期刊>Thermochimica Acta: An International Journal Concerned with the Broader Aspects of Thermochemistry and Its Applications to Chemical Problems >A comparative method for developing vapor pressure curves based on evaporation data obtained from a simultaneous TG-DTA unit
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A comparative method for developing vapor pressure curves based on evaporation data obtained from a simultaneous TG-DTA unit

机译：基于从同时TG-DTA装置获得的蒸发数据绘制蒸气压曲线的比较方法

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摘要

In the present study, a novel method for determining vapor pressure values for the construction of vapor pressure-temperature curves is introduced. These calculations are based on evaporation data, which are obtained from thermogravimetric experiments. The technique as advocated by Price and Hawkins focused on adapting the Langmuir equation for evaporation to obtain vapor pressure values for volatile organic substances. In practice, it was discovered that such calculations produce unrealistic values of the vaporization coefficient, a. Hence, a comparative method, which eliminates the need for the inclusion of this vaporization coefficient factor, is developed in the present study. This method is based on the ratio of the Langmuir equations for a reference material and the sample under investigation. The proposed method also possesses the potential for calculations that will determine the molecular weights for unknown materials. (C) 2002 Published by Elsevier Science B.V. [References: 12]
机译：在本研究中，介绍了一种确定蒸气压值的新方法，以构造蒸气压-温度曲线。这些计算基于从热重实验获得的蒸发数据。 Price和Hawkins提倡的技术着眼于使Langmuir方程适应蒸发以获得挥发性有机物质的蒸气压值。在实践中，发现这种计算会产生不切实际的蒸发系数a的值。因此，在本研究中开发了一种比较方法，该方法无需包括该汽化系数因子。该方法基于参考材料和所研究样品的Langmuir方程之比。所提出的方法还具有进行计算的潜力，该计算将确定未知材料的分子量。 （C）2002由Elsevier Science B.V.出版[参考文献：12]

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