INFLUENCE OF TECHNOLOGICAL PROCESS ON THERMAL AND MECHANICAL CHARACTERISTICS OF PYROTECHNIC COMPOSITIONS BASED ON RED PHOSPHORUS

Abstract

This study studied the technological process of pyrotechnic compositions based on red phosphorus (RP). In addition, the influence of the RP mixing method on thermal and mechanical characteristics was also investigated. Measurements such as scanning electron microscope (SEM) and energy-dispersive X-ray spectroscopy (EDX) are used to evaluate the completeness of samples; Burning rate, burning temperature, and thermogravimetry/differential thermal analysis (TG/DTA) are used to assess thermal characteristics; Compressive strength is used to determine compressive strength, in addition, ignition temperature and friction sensitivity are also used to evaluate the safety of samples. The results showed that the samples had good completion, and the compatibility of the ingredients in the pyrotechnic composition was high. Samples with RP mixed after granulation have high friction and temperature sensitivity but have better compressive strength than samples with 100% RP mixed before granulation. The samples have similar mass burning rates in the range of 0.035 - 0.063 g.cm-1, and the burning temperature of these samples is in the range of 1100 - 1500oC.