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- W2069589532 abstract "Miscibility and hydrogen-bonding interactions, as well as the morphological properties, of biodegradable polymer blends of poly(3-hydroxybutyrate) (PHB) and a 80% hydrolyzed poly(vinyl alcohol) (PVA80) were studied using Fourier transform infrared spectroscopy (FTIR) and differential scanning calorimetry (DSC). It was found that PHB is miscible with PVA80 in the amorphous phase over the whole composition range. PVA80 or PHB assumes the amorphous state when its content in the blend is lower than 30 or 20 wt %, respectively. Due to the heavy overlapping of CO stretching bands from both PVA80 and PHB and the nonmeasurable peak shift in the OH stretching band region, hydrogen-bonding interactions between the OH group of PVA80 and the CO group of PHB were not detectable at room temperature, but were observed at a higher temperature of 180 °C. This is because hydrogen-bonding interactions are promoted above the melting points of these two crystalline polymers, by increasing the mixing entropy and reducing the Δχ effect. Blending PHB with PVA80 does not have a significant effect on the OH groups of PVA80 that are hydrogen bonded with each other. Instead, the CO groups of PHB dispossess some of the OH groups that are hydrogen bonded to the CO groups of PVA80, which gives rise to the miscibility between PVA80 and PHB in the amorphous phase." @default.
- W2069589532 created "2016-06-24" @default.
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- W2069589532 date "2005-09-28" @default.
- W2069589532 modified "2023-10-03" @default.
- W2069589532 title "Miscibility and Hydrogen-Bonding Interactions in Biodegradable Polymer Blends of Poly(3-hydroxybutyrate) and a Partially Hydrolyzed Poly(vinyl alcohol)" @default.
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- W2069589532 doi "https://doi.org/10.1021/jp0532162" @default.
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