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ATR-FTIR spectra of pure PVA and PVA-(L)CNF films (PVA containing 7.5% of mechanical unbleached nanocellulose (7.5% MU), PVA containing 7.5% of mechanical bleached nanocellulose (7.5% MB), PVA containing 7.5% of TEMPO unbleached nanocellulose (7.5% TU) and PVA containing 7.5% of TEMPO bleached nanocellulose (7.5% TB)).
