Monitoring the Instantaneous Change of Energy-stored Materials

Monitoring the Instantaneous Change of Energy-stored Materials 

The mass of an energy-stored material will change rapidly when it is heated to a given temperature. The heat released in the fast changing process can be described in detail with thermal analysis. 

It can be been seen that the mass of sample decreased abruptly from 76.74% to 13.74% from 50.77 to 50.90 min (curve 1). Curve 2 shows that the rate of mass loss varied from 798% min (13.29% s ) to 1270% min (21.16%s ), and decreased to 14% min (0.23% s ). Owing to the large amount of heat released from the energy-stored explosive in such a short time, the temperature nearby rose from 193.5 to 210 °C, and a temperature pulse emerged (curve 3) 

Self-reacting substances ignite or explode by themselves even in the absence of oxygen from air. Since these chemicals readily jeopardize personal safety, it is important to estimate the risks that they pose [39). As DSC is a safe and simple method for the appraisal of these substances it has become of increasing interest. 

Almost all self-reacting substances evolve large amounts of gas, so it is difficult to measure the evolved heat accurately without the use of special high-pressure-resistant sample containers. Three types of sealed pan, aluminum, silver or stainless steel, are recommended for this purpose. The pressure-resistant limits are 2.94 MPa for aluminum and 4.9 MPa for silver and stainless steel. 

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