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Interaction and Scale of Mixing in Cellulose Acetate/Poly(N-vinyl Pyrrolidone-co-vinyl Acetate) Blends

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Abstract

Binary blends and pseudo complexes of cellulose acetate (CA) with vinyl polymers containing N-vinyl pyrrolidone (VP) units, poly(N-vinyl pyrrolidone) (PVP) and poly(N-vinyl pyrrolidone-co-vinyl acetate) [P(VP-co-VAc)], were prepared, respectively, by casting from mixed polymer solutions in N,N-dimethylformamide as good solvent and by spontaneous co-precipitation from solutions in tetrahydrofuran as comparatively poor solvent. The scale of miscibility and intermolecular interaction were examined for the blends and complexes by solid-state 13C-NMR spectroscopy. It was revealed that the formation of complexes was due to a higher frequency of hydrogen-bonding interactions between the residual hydroxyl groups of CA and the carbonyl groups of VP residues in the vinyl polymer component. From measurements of CP/MAS spectra and proton spin-lattice relaxation times (TH) in the NMR study, the existence of the hydrogen-bonding interaction was also confirmed for the miscible blends and the homogeneity of the mixing was estimated to be substantially on a scale within a few nanometers.

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Abbreviations

CA:

cellulose acetate

DS:

degree of substitution

PVAc:

poly(vinyl acetate)

PVP:

poly(N-vinyl pyrrolidone)

P(VP-co-VAc):

poly(N-vinyl pyrrolidone-co-vinyl acetate)

VAc:

vinyl acetate

VP:

N-vinyl pyrrolidone

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Correspondence to Yoshiyuki Nishio.

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Ohno, T., Yoshizawa, S., Miyashita, Y. et al. Interaction and Scale of Mixing in Cellulose Acetate/Poly(N-vinyl Pyrrolidone-co-vinyl Acetate) Blends. Cellulose 12, 281–291 (2005). https://doi.org/10.1007/s10570-004-5836-7

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  • DOI: https://doi.org/10.1007/s10570-004-5836-7

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