ABSTRACT

A differential scanning calorimetry (d.s.c.) was used to determine binary (solid + liquid) phase equilibria (SLE) for four binary mixtures, viz. (n-nitrosodiphenylamine + diphenylamine), (2-nitrodiphenylamine + ethyl centralite), (2,4-dinitro-N-ethylaniline + methyl centralite), and (2,4-diphenylamine + 4,4?-dinitroethylcentralite). These compounds are used as stabilizers in gun powders and propellants. Results obtained with this technique are compared with those correlated by NRTL and ideal models. It was found out that all the systems are simple eutectic systems and deviations between experimental and predicted SLE results were observed.

Compounds

#	Formula	Name
1	C12H10N2O	N-nitroso-N-phenylbenzenamine
2	C12H11N	diphenylamine
3	C17H20N2O	1,3-diethyl-1,3-diphenylurea
4	C12H10N2O2	2-nitrodiphenylamine
5	C12H9N3O4	2,4-dinitrodiphenylamine
6	C17H18N4O5	1,3-diethyl-1,3-bis(4-nitrophenyl)urea
7	C15H16N2O	1,3-dimethyl-1,3-diphenylurea
8	C8H9N3O4	2,4-dinitro-N-ethylaniline

Datasets

The table above is generated from the ThermoML associated json file (link above). POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied; the numbers refer to the table of compounds on the left.
Type	Compound-#	Property	Variable	Constraint	Phase	Method	#Points
POMD	1	Molar enthalpy of transition or fusion, kJ/mol ; Crystal			Crystal Liquid Air at 1 atmosphere	DSC	1
POMD	1	Normal melting temperature, K ; Crystal			Crystal Liquid Air at 1 atmosphere	DTA	1
POMD	2	Molar enthalpy of transition or fusion, kJ/mol ; Crystal			Crystal Liquid Air at 1 atmosphere	DSC	1
POMD	2	Normal melting temperature, K ; Crystal			Crystal Liquid Air at 1 atmosphere	DTA	1
POMD	3	Molar enthalpy of transition or fusion, kJ/mol ; Crystal			Crystal Liquid Air at 1 atmosphere	DSC	1
POMD	3	Normal melting temperature, K ; Crystal			Crystal Liquid Air at 1 atmosphere	DTA	1
POMD	4	Molar enthalpy of transition or fusion, kJ/mol ; Crystal			Crystal Liquid Air at 1 atmosphere	DSC	1
POMD	4	Normal melting temperature, K ; Crystal			Crystal Liquid Air at 1 atmosphere	DTA	1
POMD	5	Molar enthalpy of transition or fusion, kJ/mol ; Crystal			Crystal Liquid Air at 1 atmosphere	DSC	1
POMD	5	Normal melting temperature, K ; Crystal			Crystal Liquid Air at 1 atmosphere	DTA	1
POMD	6	Molar enthalpy of transition or fusion, kJ/mol ; Crystal			Crystal Liquid Air at 1 atmosphere	DSC	1
POMD	6	Normal melting temperature, K ; Crystal			Crystal Liquid Air at 1 atmosphere	DTA	1
POMD	7	Molar enthalpy of transition or fusion, kJ/mol ; Crystal			Crystal Liquid Air at 1 atmosphere	DSC	1
POMD	7	Normal melting temperature, K ; Crystal			Crystal Liquid Air at 1 atmosphere	DTA	1
POMD	8	Molar enthalpy of transition or fusion, kJ/mol ; Crystal			Crystal Liquid Air at 1 atmosphere	DSC	1
POMD	8	Normal melting temperature, K ; Crystal			Crystal Liquid Air at 1 atmosphere	DTA	1
POMD	1 2	Solid-liquid equilibrium temperature, K ; Liquid	Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 2	DTA	12
POMD	1 2	Solid-liquid equilibrium temperature, K ; Liquid	Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 1	DTA	10
POMD	1 2	Eutectic temperature, K ; Liquid	Pressure, kPa; Liquid		Liquid Crystal - 1 Crystal - 2	DTA	1
POMD	1 2	Eutectic composition: mole fraction - 1 ; Liquid	Pressure, kPa; Liquid		Liquid Crystal - 1 Crystal - 2	Derived from phase diagram analysis	1
POMD	3 4	Solid-liquid equilibrium temperature, K ; Liquid	Mole fraction - 4; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 3	DTA	11
POMD	3 4	Solid-liquid equilibrium temperature, K ; Liquid	Mole fraction - 4; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 4	DTA	11
POMD	3 4	Eutectic temperature, K ; Liquid	Pressure, kPa; Liquid		Liquid Crystal - 3 Crystal - 4	DTA	1
POMD	3 4	Eutectic composition: mole fraction - 3 ; Liquid	Pressure, kPa; Liquid		Liquid Crystal - 3 Crystal - 4	Derived from phase diagram analysis	1
POMD	5 6	Solid-liquid equilibrium temperature, K ; Liquid	Mole fraction - 6; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 5	DTA	11
POMD	5 6	Solid-liquid equilibrium temperature, K ; Liquid	Mole fraction - 5; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 5	DTA	11
POMD	5 6	Eutectic temperature, K ; Liquid	Pressure, kPa; Liquid		Liquid Crystal - 5 Crystal - 6	DTA	1
POMD	5 6	Eutectic composition: mole fraction - 5 ; Liquid	Pressure, kPa; Liquid		Liquid Crystal - 5 Crystal - 6	Derived from phase diagram analysis	1
POMD	7 8	Solid-liquid equilibrium temperature, K ; Liquid	Mole fraction - 8; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 7	DTA	9
POMD	7 8	Solid-liquid equilibrium temperature, K ; Liquid	Mole fraction - 8; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 8	DTA	7
POMD	7 8	Eutectic temperature, K ; Liquid	Pressure, kPa; Liquid		Liquid Crystal - 7 Crystal - 8	DTA	1
POMD	7 8	Eutectic composition: mole fraction - 7 ; Liquid	Pressure, kPa; Liquid		Liquid Crystal - 7 Crystal - 8	Derived from phase diagram analysis	1

Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Measurement and prediction of (solid + liquid) equilibria of gun powder's and propellant's stabilizers mixtures

Mekki, A.[Ahmed], Khimeche, K.[Kamel], Dahmani, A.[Abdallah]

ABSTRACT