Miscibility of poly(methacrylic acid)/poly(4-vinylpyridine) blends and complexes investigated by high-resolution solid-state 13C NMR
作者： J.Z Yi , S.H Goh
DOI: 10.1016/S0032-3861(01)00462-1
关键词:
摘要: Abstract Polymer blends and complexes prepared from poly(methacrylic acid) (PMAA) poly(4-vinylpyridine) (P4VPy) were investigated by differential scanning calorimetry (DSC) high-resolution solid-state 13 C nuclear magnetic resonance (NMR) spectroscopy. Complexes obtained ethanol/water (1:1) solutions, whereas cast dimethylformamide (DMF) solutions. Each of the showed one composition-dependent glass transition temperature ( T g ), indicating that both are homogeneous on a scale 10–30 nm. Furthermore, value complex is much higher than blend with same composition. Measurements proton spin–lattice relaxation time in rotating frame, 1 ρ (H), reveal each has 1–3 nm. However, calculated domain sizes almost same.
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