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- W2083592007 abstract "We investigated a drastic conformation change in a poly(ethylene oxide) (PEO) chain during the hydrogelation process using infrared (IR) spectroscopy and quantum chemical calculations (QCCs). Time-resolved in situ IR spectra of the hydrogelling process of a semi-crystalline PEO solid were measured using a flow-through cell. It was found from the time-resolved IR study that gauche conformations around the C–C bonds in the crystalline phase PEO chain maintain their conformations even after hydrogelation, while at least half of the trans conformations around the C–O bonds change into gauche conformations upon hydrogelling. With regard to the phenomena of these conformation changes after contacting water, the destruction and hydrogelation of the crystalline phase around the C–C bonds of the hydrophobic moiety occur prior to changes around the C–O bonds of the hydrophilic moiety. In addition, our QCC confirmed that the stable hydration structure of bridging water, wherein the two hydroxyl groups in a water molecule donate hydrogen bonds to every other ether oxygen atoms in the PEO chain." @default.
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- W2083592007 date "2011-11-01" @default.
- W2083592007 modified "2023-10-18" @default.
- W2083592007 title "Time-resolved conformational analysis of poly(ethylene oxide) during the hydrogelling process" @default.
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- W2083592007 doi "https://doi.org/10.1016/j.polymer.2011.09.049" @default.
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