polyethylene terephthalate

This study investigates the influence of low­temperature exposure (–18 °C) and ultraviolet (UV) irradiation on the mechanical properties of polymer films used in flexible packaging applications. The research focuses on widely used materials, including glossy and matte polypropylene (PP) and polyethylene terephthalate (PET) films of various thicknesses. Mechanical tensile tests were performed to evaluate the elasticity, tensile strength, and mechanical resistance of the films before and after exposure to cold and UV radiation.

The environmental impact of residual mineral fertilizers not utilized by plants is analyzed. It is shown that this negative effect extends to all elements of the environment: soil, atmosphere, hydrosphere. The perspective of the application of encapsulated mineral fertilizers that allow prolonged release of plant nutrients is outlined. The appliccation of modified polyethylene terephthalate (PETF) as a capsule-forming material for encapsulated mineral fertilizers is proposed. PET modification and fertilizer encapsulation technologies have been tested.

The article presents the technological possibility of using PET wastes for encapsulation of granulated mineral fertilizers. The schematic flowsheet is proposed to obtain film-forming composition. An encapsulated ammonium nitrate with predictable kinetics of fertilizer components release was obtained.