DSC Study of Solid-Liquid Equilibria for Energetic Binary Mixtures of Methylnitramine with 2,4-Dinitro-2,4-diazapentane and 2,4-Dinitro-2,4-diazahexane

Binary phase diagrams for two mixtures of methylnitramine (1) + 2,4-dinitro-2,4-diazapentane (2) (eutectic temperature T _E = 285.1 K, eutectic composition x ₁ = 0.565) and methylnitramine (1) + 2,4-dinitro-2,4-diazahexane (2) (eutectic temperature T _E = 280.3 K, eutectic composition x ₁ = 0.653) were studied using differential scanning calorimetries (DSC). For both systems simple eutectic behavior was observed. The eutectic compositions were also determined using Gray’s model and the fractional transformation method.     

Effect of various types of interaction on the stability of some ternary interpolymer complexes involving poly(ethylene imine), poly(acrylic acid) and poly(ethylene glycol)

The effect of various types of interaction on the stability of multi‐component interpolymer complexes was studied for some three‐component interpolymer complexes involving poly(ethylene imine), poly(acrylic acid) and poly(ethylene glycol). The degree of linkage (θ), stability constant (K) and related thermodynamic parameters (e.g. ΔH⁰ and ΔS⁰) of these complexes were determined at several temperatures and compared for various complexation systems. The comparative study indicated considerable difference in the values of these parameters, which is explained in terms of various modes of interaction between the components. Copyright © 2010 Society of Chemical Industry