Miscibility and hydrogen bonding in blends of poly(vinyl acetate) with phenolic resin
| Autor: | Mei-Wen Huang, Su-Yun Fang, Shiao-Wei Kuo, Feng-Chih Chang, Hew-Der Wu |
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| Rok vydání: | 2002 |
| Předmět: |
Polymers and Plastics
Hydrogen bond Organic Chemistry Infrared spectroscopy Miscibility chemistry.chemical_compound Differential scanning calorimetry chemistry Polymer chemistry Materials Chemistry Vinyl acetate Physical chemistry Fourier transform infrared spectroscopy Glass transition Equilibrium constant |
| Zdroj: | Polymer. 43:2479-2487 |
| ISSN: | 0032-3861 |
| DOI: | 10.1016/s0032-3861(02)00007-1 |
| Popis: | The miscibility of phenolic resin and poly(vinyl acetate) (PVAc) blends was investigated by differential scanning calorimeter (DSC), Fourier transform infrared spectroscopy (FT-IR) and solid state 13 C nuclear magnetic resonance (NMR). This blend displays single glass transition temperature ( T g ) over entire compositions indicating that this blend system is miscible in the amorphous phase due to the formation of hydrogen bonding between hydroxyl groups of phenolic resin and carbonyl groups of PVAc. Quantitative measurements on fraction of hydrogen-bonded carbonyl group using both 13 C solid-state NMR and FT-IR analyses result in good agreement between these two spectroscopic techniques. According to the proton spin–lattice relaxation time in the rotating frame ( T 1ρ H ), the phenolic/PVAc blend is intimately mixed on a scale less than 2–3 nm. Furthermore, the inter-association equilibrium constant and its related enthalpy of phenolic/PVAc blends were determined as a function of temperatures by infrared spectra based on the Painter–Coleman association model. |
| Databáze: | OpenAIRE |
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