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The degradation of films of poly(3 hydroxybutyrate) and its blends with ethylene-propylene rub ber during their treatment with water and UV radiation at 20 and 90°C is studied. Changes in the structural characteristics of both components during degradation are investigated via DSC, IR spectroscopy, and opti cal microscopy. It is shown that pure poly(3 hydroxybutyrate) features the highest weight loss during degra dation in distilled water at 20°C. In the case of the blends, the most significant changes in the structures of the components are observed for the 50 : 50 (wt %) sample.

Nonwoven fibers from biodegradable polymers such as polylactide and poly-3-hydroxybutyrate were obtained by electrospinning. The fiber morphology was studied by optical microscopy. The fiber materials were used like the substrates for the plant growing. The sowing qualities of the "Athena"winter wheat (triticumaestivum L.) and biometric indicators of the plants were determined. The biometric indicators of wheat plants grown on polymer substrates are higher compared with the GOST technique. Eco-friendly fiber materials are promising for the agricultural application. Polylactide and poly-3-hydroxybutyrate undergo a hydrolysis process. They are destroyed to form nutrients for the growth and development of wheat plants.

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