Nitrobenzene liquid temperature range

Liquid/solid Equilibria. The solubility of crystalline polymers is normally considerably lower than that of amorphous polymers because they require an additional energy, namely, the heat of fusion, in order for the bulk polymer to mix with solvent. Fig. 6 shows as an example the behavior of semi crystalline polyethylene in two different solvents(20). The solvent xylene is favorable in the temperature range of interest (no liquid/liquid demixing) up to the melting temperature T. o of the pure polymer a saturated solution coexists with the crystalline polyethylene and the components are completely miscible once T has surpassed Tm,o- Nitrobenzene on the other hand, is thermod5mamically less favorable and exhibits liquid/liquid demixing in addition to the solid/liquid phase separation. In this case one observes the coexistence of three phases at a characteristic temperature (broken line in Fig. 6) and concentration. 

Powerful liquid explosives mixtures of nitrobenzene and liquid O4 were also known and in some use (Vol. Ill, p. 289). Recently pyrolysis of nitrobenzene was examined in the range of 275—630 C (3).. At lower temperatures nitrobenzene decomposes via direct rupture of the C-N bond to give free radicals C Hs and N02. As the temperature was raised the yield of NOj considerably decreased and at 625 C the volatile products were composed of ... 

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