Polystyrene (PS) is another of the selected polymers; its chemical formula is (-[CH\({}_{2}\)CH(C\({}_{6}\)H\({}_{5}\))-]-\({}_{n}\) and it belongs to the group of polyolefins. Polystyrene also comes in various forms: solid polystyrene, expanded polystyrene (EPS), and extruded polystyrene (XPS). Due to different properties, various types of the mentioned forms can be distinguished. For example, among the solid material, it is possible to distinguish, i.e., a general-purpose polystyrene (GPPS) or a high-impact polystyrene (HIPS). Numerous everyday objects are made of solid polystyrene; concerning the analyzed case, this material does not, however, pose a significant threat compared to the other two forms. Expanded PS, in turn, is one of the most widely used insulation materials. The walls of storage rooms are often covered with EPS, which greatly contributes to the protection of rooms against moisture as well as to reduction of thermal losses of buildings. Like the vast majority of polymers, polystyrene is combustible. Due to its commonness, additives are used to retard the flammability of the material. Typically, hexabromocyclododecane (HBCD) serves as such an additive, in an amount of up to 0.5% by mass. This type of polystyrene is marked as self-extinguishing (SE) (EPS SE). It is not only much more difficult to ignite, but also has a lower fire spread rate. In addition, the method of assembly and special preparation and insulation of the outer surface of the panels are aimed at preventing the polystyrene from direct contact with the heat source in the event of fire. When exposed to high temperatures, the material softens and melts, with a possibility of dripping. Due to the low density of the material, the amount of heat released during its combustion is relatively small. Thermal decomposition products of PS do not support combustion, so the material should self-extinguish after the removal of heat source. Another group of polymers that may potentially come into direct contact with AN during its life cycle are polyamides (PA). Polyamides are a group of polymers that, in their main chains, contain a unit with amide bonds: -C(O)-NH-. Due to different chemical composition and production methods, ready-made materials from the polyamides' group may have different functional properties. Due to the widespread use, in further analysis, the research was carried out on nylon (PA66). The synthesis of PA66 is based on the condensation of adipic acid and hexamethylenediamine. Polyamides show a very strong tendency to crystallize (35-70%), additionally reinforced by the formation of hydrogen bonds between the oxygen and nitrogen atoms from two different amide groups. As a result, polyamides are harder and more difficult to melt than, for example, polyesters, being far superior to vinyl polymers (e.g., PVC) in this respect. They are most often available on the market in the form of fibrous materials. Polyamides are used to produce nylons (aliphatic polyamides) and arand fibers (aromatic polyamides). They are widely used in the textile industry, in the production of both clothing and large-area textiles. Polyamide fibers are harder and have a higher mechanical resistance than polyesters and vinyl polymers, thanks to which they are also used in very niche applications such as, e.g., the production of chew-resistant fabrics (resistant to being chewed through by rodents) or the production of materials for noise and vibration suppression (ropes, nets, mesh, etc.). Due to the possibility of direct contact with AN, it is also worth mentioning the use of PA in the automotive industry where many components, such as engine covers or radiator covers, can be made of this material due to the reduction of costs and weight compared to such elements made of steel. In addition, PA are used for the production of braiding for electrical wires, parts of automated devices, fishing nets, or as packaging.