Abstract
N-Nitrodihydroxyethyl dinitrate (DINA) is a commonly used energetic material. In this work, the effect of diethanolamine (DEA) on the thermal stability of DINA was studied. Firstly, the decomposition kinetics of DINA under the influence of DEA was analyzed by applying dynamic differential scanning calorimeter (DSC) experiments. Then, isothermal DSC tests with the “Interruption and re-scanning” method determined that the decomposition reactions of DINA containing 29% DEA consists of four continuous steps: the first step is a n-order reaction, and the last three steps are autocatalytic reactions. The kinetic parameters of the four-step reaction model were calculated by model-fitting method. Finally, the thermal risk parameter like TMRad was predicted based on the kinetic parameters, which has certain guiding significance for the process production of DINA.
Highlights
N-Nitrodihydroxyethyl dinitrate, commonly known as DINA, is a chemical product with high energy and sensitivity, which will decompose at high temperature, accompanied by rapid gas and heat production [1,2,3]
Note: m1 is the mass of DINA, m2 is the mass of related reactants, T0 is the onset temperature, Tp is the peak temperature of P2, Q is the specific heat release
differential scanning calorimeter (DSC) test of DINA mixed with related raw materials at 8oC/min
Summary
N-Nitrodihydroxyethyl dinitrate, commonly known as DINA (see Fig. for its molecular structure), is a chemical product with high energy and sensitivity, which will decompose at high temperature, accompanied by rapid gas and heat production [1,2,3] It is mainly used as a high energy plasticizer in propellants or as a gelling agent in the preparation of nitrocellulose [4,5]. The purpose is to understand the related substances that have a greater impact on the thermal stability of DINA by the nitric acid/magnesium oxide (HNO3/MgO) approach. On this basis, to further grasp the thermal risk parameters of the less stable mixtures. These research results have an important guiding role in the safe production of DINA
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