ОЦІНКА УФ-СТІЙКОСТІ ПЛІВОК НА ОСНОВІ ПЛА З ВИКОРИСТАННЯМ НАТУРАЛЬНИХ ПЛАСТИФІКАТОРІВ

The paper investigates the effect of biodegradable plasticizers - natural and soybean waxes - on the stability of polylactide (PLA) films under the influence of ultraviolet radiation. The object of the study is biopolymer films based on PLA, and the subject is the modification of their properties using natural plasticizers. The aim is to evaluate the effectiveness of such additives in terms of improving performance characteristics without losing the environmental benefits of the material. It was found that both types of waxes improve the hydrophobicity of the film after UV aging compared to pure PLA and samples modified with PEG. The smallest decrease in the contact angle was observed for samples with natural wax. The conclusions indicate the feasibility of using bioplastifiers to increase the UV stability of PLA films without reducing their biodegradability, which opens up the prospects for their use in the field of eco-friendly packaging.