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|Title:||Interactions in miscible blends and complexes of poly(N-acryloylmorpholine) with poly (p-vinylphenol)|
|Citation:||Yi, J.Z., Goh, S.H. (2002-06-10). Interactions in miscible blends and complexes of poly(N-acryloylmorpholine) with poly (p-vinylphenol). Polymer 43 (16) : 4515-4522. ScholarBank@NUS Repository. https://doi.org/10.1016/S0032-3861(02)00291-4|
|Abstract:||Poly(p-vinylphenol) (PVPh) and poly(N-acryloylmorpholine) (PAcM) form interpolymer complexes in ethanol/water (1:1) solution. However, only ordinary blends are obtained from dimethylformamide solution. Each of the complexes and ordinary blends shows one composition-dependent glass transition temperature, indicating its single-phase nature. Fourier transform infrared spectroscopy and 13C solid-state nuclear magnetic resonance spectroscopy reveal the existence of hydrogen-bonding interactions between the hydroxyl groups of PVPh and the carbonyl groups as well as the ether oxygen of PAcM in the blends and complexes. In addition, X-ray photoelectron spectroscopy shows that the nitrogen atoms in PAcM are also involved in hydrogen-bonding interactions. Measurements of proton spinlattice relaxation time in the rotating frame, T1p(H), reveal that each of the complexes and ordinary miscible blends has one composition-dependent T1p(H), indicating an intimate mixing on a scale of about 1.5 nm. The blends show a higher degree of surface enrichment of PVPh than the complexes. © 2002 Elsevier Science Ltd. All rights reserved.|
|Appears in Collections:||Staff Publications|
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