The thermokinetics of the curing reactions between poly-（3-azidomethyl-3-methyloxetane）(PAMMO) and bispropargyl Succinate（BPS） were studied by using a *** thermodynamics parameters（the activation enthalpies,the a...
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The thermokinetics of the curing reactions between poly-（3-azidomethyl-3-methyloxetane）(PAMMO) and bispropargyl Succinate（BPS） were studied by using a *** thermodynamics parameters（the activation enthalpies,the activation entropies,the activation free energies）,the rate constant,three thermokinetic parameters（the activation energies,the pre-exponential constant and the reaction order） and the enthalpies of the curing reactions between PAMMO and BPS in the temperature range of 50—65 ℃ were obtained,showing that the main reaction leading to a triazole structure easily took place in the studied *** linear relationship between lnk and the molar ratio of triple bonds to azide groups was ***,the corresponding kinetic equation describing the curing reaction between PAMMO and BPS was da/dt = 10（1-α） at 333.15 K.
The properties of dissolution in different solvents,the specific heat capacity and thermal decomposition process under the non-isothermal conditions for energetic triazole ionic salts 1,2,4-triazolium nitrate(1a),1,2,...
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The properties of dissolution in different solvents,the specific heat capacity and thermal decomposition process under the non-isothermal conditions for energetic triazole ionic salts 1,2,4-triazolium nitrate(1a),1,2,3-triazolium nitrate(1b),3,4,5triamino-1,2,4-triazolium nitrate(2a),3,4,5-triamino-1,2,4-triazolium dinitramide(2b)were precisely measured using a Calvet *** thermochemical equation,differential enthalpies of dissolution(△difH m ),standard molar enthalpies of dissolution(△difH m ),apparent activation energy(E),pre-exponential constant(A),kinetic equation,linear relationship of specific heat capacity with temperature over the temperature range from 283 to 353 K,standard molar heat capacity(C p,m)and enthalpy,entropy and Gibbs free energy at 283–353 K,taking 298.15 K as the benchmark for 1a,1b,2a and 2b were obtained with treating experimental data and theoretical calculation *** kinetic and thermodynamic parameters of thermal decomposition reaction,critical temperature of thermal explosion(Tb),self-accelerating decomposition temperature(TSADT)and adiabatic time-to-explosion(t)of 1a,1b,2a and 2b were *** heat-resistance abilities were *** was obtained on the relation between molecular structures and properties of 1a,1b,2a and 2b.
An exothermic reaction between MgB2 and water was observed in our laboratory at high temperature, although no obvious reaction occurred at room temperature. The reaction process of MgB2 and water was therefore studied...
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An exothermic reaction between MgB2 and water was observed in our laboratory at high temperature, although no obvious reaction occurred at room temperature. The reaction process of MgB2 and water was therefore studied by using microcalorimetry. The results showed that the reaction enthalpies of MgB2 with water and the formation enthalpies of MgB2 at T = (323.15, 328.15, 333.15 and 338.15) K are (–313.15, –317.85, –322.09, –329.27) kJ?mol–1, and (–238.96, –237.73, –236.50, –234.30) kJ●mol–1, respectively. The standard enthalpy of formation and standard molar heat capacity of MgB2 obtained by extrapolation method are –245.11 kJ●mol–1 and 246 J●mol–1●K–1, respectively. The values of activation energy E, pre-exponential factor A and the reaction order for the reaction of MgB2 and water over the temperature range from 323.15 K to 338.15 K are 50.80 kJ●mol–1, 104.78 s–1 and about 1.346, respectively. The positive values of ΔG≠ and ΔH≠ and negative value of ΔS≠ indicate that the reaction can take place easily above 314.45 K.
3-Nitro-1,2,4-triazol-5-one(NTO)is a novel high-energy and low-sensitivity explosive,its density is 1.936g/cm3,and it has been evaluated as an insensitive component to replace RDX in some explosive and propellant *** ...
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3-Nitro-1,2,4-triazol-5-one(NTO)is a novel high-energy and low-sensitivity explosive,its density is 1.936g/cm3,and it has been evaluated as an insensitive component to replace RDX in some explosive and propellant *** structure of NTO has been determined,and its thermal decomposition and correlative thermal properties also have been reported widely[1-4].But,the dissolution properties of NTO in solvents have rarely been *** this study,a RD496-2000 Calvet microcalorimeter was used to investigate the dissolution behavior of NTO in DMSO and *** kinetic equation of the two dissolution processes are obtained,respectively,which will be useful for understanding its crystallization in production and purification processes,and can provide basic guidance for its applications.
Ammonium Di(2,4,6,-trinitrophenyl)amide is a new high-nitrogen energetic compound which consists of anion of Di(2,4,6,-trinitrophenyl)amide and cation of Ammonium. The dissolution process was studied for the first, an...
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Ammonium Di(2,4,6,-trinitrophenyl)amide is a new high-nitrogen energetic compound which consists of anion of Di(2,4,6,-trinitrophenyl)amide and cation of Ammonium. The dissolution process was studied for the first, and the enthalpies of dissolution for ammonium Di(2,4,6,-trinitrophenyl)amide(ADTA) in N-methl-2-pyrrolidone (NMP) were measured using a RD496-2000 Calvet microcalorimeter(MianYang CP Thermal Analysis Instrument CO., LTD) at 298.15 K under atmospheric pressure. Empirical formulae for the calculation of the enthalpies of dissolution (△disaH), the linear relationships between the rate (k) and the molality of ADTA(b), and the corresponding kinetic equation describing this dissolution processe for ADTA in NMP were obtained from the experimental data of the dissolution processes of ADTA in NMP. We get
Amorphous zero-valent iron (AZVI) is a promising material for the treatment of heavy metal pollution due to its special crystal structure. However, little was known about their electron transport properties, and the i...
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