Fig. 3.
FTIR spectra of precursor polymers (top) and PVA-Alg pellets (bottom): (a) PVA23 precursor, (b) PVA98 precursor, (c) alginic acid sodium salt precursor and pellets of (d) PV50-A05, (e) PV50-A10 and (f) PV50-A15.
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