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Thermal Behavior of 2‐(Dinitromethylene)‐1,3‐diazacyclopentane
Author(s) -
Xu Kangzhen,
Ren Xiaolei,
Song Jirong,
Zhao Fengqi,
Ding Li,
Yi Jianhua,
Wang Yaoyu
Publication year - 2009
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.200990320
Subject(s) - chemistry , exothermic reaction , thermal decomposition , adiabatic process , heat capacity , thermodynamics , enthalpy , activation energy , isothermal process , thermal stability , decomposition , organic chemistry , physics
Abstract A new compound, 2‐(dinitromethylene)‐1,3‐diazacyclopentane (DNDZ), was prepared by the reaction of 1,1‐diamino‐2,2‐dinitroethylene (FOX‐7) with 1,2‐diaminoethane in N ‐methylpyrrolidone (NMP). Thermal decomposition of DNDZ was studied under non‐isothermal conditions by DSC, TG/DTG methods, and the enthalpy, apparent activation energy and pre‐exponential factor of the exothermic decomposition reaction were obtained as 317.13 kJ·mol −1 , 269.7 kJ·mol −1 and 10 24.51 s −1 , respectively. The critical temperature of thermal explosion was 261.04°C. Specific heat capacity of DNDZ was determined with a micro‐DSC method and a theoretical calculation method, and the molar heat capacity was 205.41 J·mol −1 ·K −1 at 298.15 K. Adiabatic time‐to‐explosion was calculated to be a certain value between 263–289 s. DNDZ has higher thermal stability than FOX‐7.