Thermochemistry of the binary system nitrocellulose+2,4-dinitrotoluene |
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Authors: | T Wolszakiewicz A Książczak T Książczak |
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Institution: | (1) Institute of Organic Industrial Chemistry Annopol 6, 03-236 Warsaw, Poland;(2) Department of Chemistry, Warsaw University of Technology Noakowskiego 3, 00-664 Warsaw, Poland |
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Abstract: | Melting enthalpy and mixing enthalpy of binary system 2,4-dinitrotoluene and nitrocellulose were determined by DSC method.
The maximum value of mixing enthalpy was H
max
M=1.38 kJ mol−1 for molar fraction x
w24DNT = 0.501. The Flory-Huggins parameter (c) was estimated. The solubility curves and glass transition temperatures were predicted
and compared with the experimental results.
The measurements were performed for the samples with different times of storage at room temperature. The analysis of melting
peaks for the mixture leads to the conclusion that for the long periods of storage the melting of 2,4-dinitrotoluene takes
place in the confined spaces (pores) and unconfined space (bulk). The crystallization and melting is observed during the short
time of storage in mixtures with low nitrocellulose content and in the case of mixtures with a large amount of NC the glass
transition is additionally observed.
This revised version was published online in July 2006 with corrections to the Cover Date. |
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Keywords: | 2 mixing enthalpy nitrocellulose glass transition DSC 4-dinitrotoluene |
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