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ATR-FTIR spectra (spectral range from 1200 to 900 cm−1) from short-term stability study of non-crosslinked electrospun nanofiber (NF) mat (A) and solvent cast (SC) film (B); crosslinked electrospun NF mat (C) and SC film (D). Color legend: black—initial state, green—1 month at room temperature (RT) and relative humidity (RH) of 0%, red—1 month at 40 °C and RH of 75%. Asterisk (*) denotes the absorption band at 1141 cm−1 used to evaluate the crystallinity of polyvinyl alcohol (PVA).
