期刊
THERMOCHIMICA ACTA
卷 559, 期 -, 页码 76-81出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.tca.2013.02.027
关键词
Dimethyl sulfoxide; Thermal stability; Incompatible substances; Accelerating rate calorimeter (ARC)
资金
- AstraZeneca UK
- Tianjin Municipal Natural Science Foundation [11JCYBJC 04600]
- Doctoral Fund of Ministry of Education of China [2011M500511]
Thermal decomposition of pure dimethyl sulfoxide (DMSO) and DMSO in the presence of different incompatible substances including N,N-dimethyl formylamine, NaOH, KBr and FeCl3 were investigated using accelerating rate calorimeter. Hazard indicators such as onset temperature T-onset, adiabatic temperature rise Delta T-ad, maximum pressure P-max at T-final residual pressure P-residual at 50 degrees C, maximum rate of pressure-rise (dP/dt)(max) and self-heating rate (dT/dt)(max) have been determined directly. Activation energy E-a of decomposition reaction and time to maximum rate TMRad of pure and impure DMSO have been studied from the measured self-heating rate data by assuming a zero-order reaction. Moreover, the decomposition mechanisms of pure and impure DMSO have also been discussed. Crown Copyright (C) 2013 Published by Elsevier B.V. All rights reserved.
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