Due to good mechanical properties, high tensile strength, abrasion resistance, low friction coefficient, and shape stability at elevated temperatures, as well as resistance to gasoline and solvents, polyamides are currently the most important construction material used in many industries, incl. the automotive, aerospace, electronics, and electrotechnical industries, as well as in textiles and medicine. PA are also used for the production of gears and other hardware. Glass fiber-reinforced elements show an increase in specific weight (up to 1.60 g/cm\({}^{3}\)) and very high stiffness, increased creep resistance, and high dimensional stability. These plastics, however, have a disadvantage, which is significant for some specialized applications: They are highly absorbent to moisture (2.5-2.8%). PA electrical properties are strongly dependent on the moisture content. In any case of practical application, it is recommended to dry the polyamide to a minimum value of 0.2% before processing. The drying temperature, depending on the technology, remains in the range of 80-110 \({}^{\circ}\)C. The material shows relatively high thermal stability. However, after exceeding the temperature of 310 \({}^{\circ}\)C, thermal decomposition of the polymer occurs, with the separation of decomposition products in the form of carbon monoxide, ammonia, and caprolactam. This has a negative impact on human safety nearby and may cause undesirable reactions. Polyamides are inherently flammable, as evidenced, i.e., by the low value of the LOI coefficient, which, for a pure polymer, is about 22%. The appropriate number of additives (flame retardants) allows improving thermal properties, increasing the LOI level to a safer value (above 30), and changing the material behavior under high temperatures and under combustion. Another polymer for which the tests were performed is poly(methyl methacrylate) (PMMA). It is the main component of acrylic glass, also known as organic glass (plexiglass). For certain applications, it may contain admixtures of other materials, polymers, and copolymers. This material has been widely used due to its properties, such as high transparency in the field of visible light, ease of processing, resistance to UV radiation, or high resistance to mechanical stress. Moreover, it has good insulating properties (thermal and acoustic). Organic glass is used for the production of protective screens, covers, sound barriers, and electrical insulation spacers between materials and serves as an alternative to ordinary glass in windows and sight glasses. Greenhouses and garden tunnels are its typical application in agriculture. Plexiglass is more durable and its light transmission is more effective, which has a positive effect on plant growth. On the other hand, it is more sensitive to tranishing as a result of superficial scratches. Another disadvantage of organic glass is its flammability, unlike in the case of polycarbonate, which has a similar application to PMMA. During its combustion, the molten material drips. When PMMA is burned, relatively little smoke is produced. In an oxygen-rich atmosphere, pure PMMA decomposes into carbon dioxide and water vapor. Irritating and toxic gases may also be emitted (partial depolymerization effect). In addition, PMMA can actively contribute to the fire propagation. Selected polymer materials can potentially accompany production, as well as transport, storage, or application of ammonium nitrate. Mixing of molten materials is likely during emergency events (fires). Previous studies showed that, in the case of popular polyolefins, such a randomly produced blend may have properties that can lead to the initiation of pure AN explosion due to the generated heat and shock wave.