Mass fractions, ratio

The heat of decomposition, Qj, of BAMO copolymer containing different levels of N3 bond density, KN3), is shown as a function of KN3) in Fig. 5.21. BAMO prepolymer is copolymerized with THF. The N3 bond density is varied by adjusting the mass fraction ratio of BAMO prepolymer and THF. 

System Mass fraction Mass fraction ratio... 

The yield can be calculated easily as the mass fraction ratio between the cooked must and TBV withdrawn from the smallest cask of the barrel set ... 

TNT is one of the important materials used for not only explosives for industry but also military explosives for blasting charges. Since metals are not corroded by TNT, it is cast directly into metal cases as well as pressed into warhead shells. In order to gain high explosive characteristics, TNT is mixed with other materials, such as AN, Tetryl, PETN, A1 powder, and nitramine partides121. The mixture of TNT and AN is named Amatol has a TNT/AN mass fraction ratio ranging from 0.5/0.5 to 0.2/0.8. The mixture of TNT and AN is melted and then cast. The mixture of TNT and A1 named Tritonal has a mass fraction ratio of TNT/A1 = 0.8/0.2. The mixture of TNT and HMX is named Octol composed of the mass fraction ratio of TNT/H MX ranging from 0.3/0.7 to 0.25/0.75. The maximum detonation velocity, 8600 m/s, is obtained when the density is 1800 kg/m3. 

The mixture of TNT and RDX is named Composition A when compressed with a small amount of wax. The detonation velocity is approximately 8100 m/s. When TNT and RDX are cast together with a wax, the mixture is named Composition B. The mass fraction ratio is TNT/RDX = 0.4/0.6 with 0.1 % wax. The density is in the range 1600-1750 kg/m3 and the detonation velocity is about 8000 m/s. The melting point of TNT is 353.8 K, which is too low for its use in warhead charges under conditions of supersonic or hypersonic flight (Mach number > 5). Deformation of charges occurs because of the aerodynamic heating. 

Comments. The mass fraction ratio of W2/W3 in the solvent mixture was kept constant at value of 70/30. 

In the previous chapter, the optimized mechanical properties are achieved when 0.56 %wt. SDS was added to the GSA composites. The GSA-SDS composites of various aerogel granule sizes are fabricated with 0.56 %wt. SDS for gelatin to silica aerogel granules mass fraction ratios of 0.2 0.8 and 0.4 0.6 respectively. The effects of the granule size on the thermal conductivity are investigated for the temperature profile described in Sect. 6.1 is shown in Fig. 6.9. 

Comments The mass fraction ratio of polymer(B)/polymer(C) = 0.400/0.600 is kept constant. 

Comments. wb/wa denotes the mass fraction ratio of PEG/water in the liquid phase. ... 

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