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. 2019 Dec 12;11(12):678. doi: 10.3390/pharmaceutics11120678

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© 2019 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Attenuated total reflectance Fourier transform IR spectroscopy (ATR-FTIR) spectra (spectral range from 4000 to 500 cm⁻¹) of sodium alginate (SA) (A) and polyvinyl alcohol (PVA) powders (B); physical mixture of SA and PVA powders (C); non-crosslinked electrospun nanofiber (NF) mat (D); non-crosslinked solvent cast (SC) film (E); crosslinked electrospun NF mat (F) and crosslinked SC film (G). Asterisk (*) denotes the absorption band at 1141 cm⁻¹ used to evaluate the crystallinity of PVA.