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 (T1ρH) 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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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